{"id":4120,"date":"2025-12-22T22:01:40","date_gmt":"2025-12-22T21:01:40","guid":{"rendered":"https:\/\/www.swissrocketman.fr\/Wordpress\/?p=4120"},"modified":"2026-05-24T09:45:17","modified_gmt":"2026-05-24T07:45:17","slug":"diode-laser-raycus-400w","status":"publish","type":"post","link":"https:\/\/www.swissrocketman.fr\/Wordpress\/diode-laser-raycus-400w\/","title":{"rendered":"DOUBLAGE DE FREQUENCE AVEC UNE DIODE LASER RAYCUS 400W"},"content":{"rendered":"
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Le doublage de fr\u00e9quence continu \u00e0 partir d\u2019un laser diode \u00e0 976 nm 40W est physiquement possible, mais la difficult\u00e9 principale est la densit\u00e9 de puissance (et donc le seuil de dommage et les effets thermo\u2011optiques) dans le cristal et sur les faces d\u2019entr\u00e9e\/sortie.<\/span>\u200b<\/span><\/h2>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n
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<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div><\/section><\/div>\n
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1\ufe0f\u20e3 Architecture globale retenue (celle qui fonctionne)<\/h1>\n

\ud83d\udc49 Principe \u00e9prouv\u00e9 industriellement<\/strong><\/p>\n

Diodes 976 nm \u2192 Cavit\u00e9 laser Yb:YAG TEM\u2080\u2080 \u2192 SHG intracavit\u00e9 (LBO) \u2192 488\u2013515 nm<\/strong><\/p>\n

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\u26a0\ufe0f Remarque importante
Le Yb:YAG \u00e9met naturellement \u00e0<\/strong>\u00a01029\u20131031 nm<\/strong>.
\u2192 Le bleu obtenu sera 515 nm<\/strong><\/p>\n<\/blockquote>\n

2\ufe0f\u20e3 Cavit\u00e9 laser Yb:YAG r\u00e9aliste (dimensionn\u00e9e)<\/span><\/h2>\n

\ud83d\udd39 Milieu actif<\/h2>\n
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\n\n\n\n\n\n\n\n\n\n\n
Param\u00e8tre<\/th>\nValeur<\/th>\n<\/tr>\n<\/thead>\n
Cristal<\/td>\nYb:YAG<\/td>\n<\/tr>\n
Dopage<\/td>\n7 at.%<\/strong> (5\u201310 % OK)<\/td>\n<\/tr>\n
Dimensions<\/td>\n3 \u00d7 3 \u00d7 5 mm<\/strong><\/td>\n<\/tr>\n
Orientation<\/td>\n\u27c2 axe optique<\/td>\n<\/tr>\n
Rev\u00eatement<\/td>\nHR @ 1030 nm \/ HT @ 976 nm<\/td>\n<\/tr>\n
Refroidissement<\/td>\nCuivre + eau (\u226420 \u00b0C)<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<\/div>\n
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\ud83d\udd39 Pompage (ton module existant)<\/h2>\n
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\n\n\n\n\n\n\n\n\n\n
Param\u00e8tre<\/th>\nValeur<\/th>\n<\/tr>\n<\/thead>\n
\u03bb pompe<\/td>\n976 nm<\/td>\n<\/tr>\n
Puissance diode<\/td>\n260 W<\/td>\n<\/tr>\n
Puissance absorb\u00e9e<\/td>\n~85 % \u2192 220 W<\/strong><\/td>\n<\/tr>\n
Spot pompe<\/td>\n\u00d8 600 \u00b5m<\/strong><\/td>\n<\/tr>\n
G\u00e9om\u00e9trie<\/td>\npompage longitudinal<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<\/div>\n
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\ud83d\udd39 G\u00e9om\u00e9trie de cavit\u00e9 (stable TEM\u2080\u2080)<\/h2>\n

Cavit\u00e9 plane\u2013concave (classique & robuste)<\/h3>\n
\n
\n\n\n\n\n\n\n\n\n\n
\u00c9l\u00e9ment<\/th>\nSp\u00e9cification<\/th>\n<\/tr>\n<\/thead>\n
M1 (entr\u00e9e)<\/td>\nPlan, HT@976 \/ HR@1030<\/td>\n<\/tr>\n
M2 (sortie)<\/td>\nROC = 100 mm<\/td>\n<\/tr>\n
Longueur cavit\u00e9<\/td>\n80 mm<\/strong><\/td>\n<\/tr>\n
Waist laser<\/td>\nw\u2080 \u2248 150 \u00b5m<\/strong> (dans Yb:YAG)<\/td>\n<\/tr>\n
M\u00b2 attendu<\/td>\n\u2264 1.1<\/strong><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<\/div>\n

\ud83d\udc49 La cl\u00e9 est recouvrement pompe \/ mode laser<\/strong>.<\/p>\n

3\ufe0f\u20e3 Puissance laser IR attendue (calcul r\u00e9aliste)<\/h1>\n

Hypoth\u00e8ses conservatrices<\/h3>\n
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    Rendement quantique Yb:YAG \u2248 0.9<\/p>\n<\/li>\n

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    Rendement optique global \u2248 45 %<\/p>\n<\/li>\n<\/ul>\n

    Calcul<\/h3>\n
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    • \n

      Puissance absorb\u00e9e : 220 W<\/p>\n<\/li>\n

    • \n

      Puissance laser IR :<\/p>\n<\/li>\n<\/ul>\n

      P1030\u22480.45\u00d7220=100\u00a0W\u00a0CWP_{1030} \\approx 0.45 \\times 220 = \\boxed{100~W~CW}<\/span>P<\/span>1030<\/span><\/span><\/span>\u200b<\/span><\/span><\/span><\/span><\/span>\u2248<\/span><\/span>0.45<\/span>\u00d7<\/span><\/span>220<\/span>=<\/span><\/span>100\u00a0<\/span>W<\/span>\u00a0<\/span>C<\/span>W<\/span><\/span><\/span>\u200b<\/span><\/span><\/span><\/span><\/span><\/span><\/span><\/span><\/p>\n

      \ud83d\udc49 Valeur industriellement r\u00e9aliste<\/strong> en TEM\u2080\u2080<\/p>\n

      \n

      4\ufe0f\u20e3 G\u00e9n\u00e9ration de seconde harmonique (SHG)<\/h1>\n

      \ud83d\udd39 Cristal non lin\u00e9aire<\/h2>\n
      \n
      \n\n\n\n\n\n\n\n\n\n
      Param\u00e8tre<\/th>\nValeur<\/th>\n<\/tr>\n<\/thead>\n
      Cristal<\/td>\nLBO<\/strong><\/td>\n<\/tr>\n
      Dimensions<\/td>\n3 \u00d7 3 \u00d7 10 mm<\/strong><\/td>\n<\/tr>\n
      Phase matching<\/td>\nType I<\/td>\n<\/tr>\n
      Temp\u00e9rature<\/td>\n150\u2013180 \u00b0C<\/td>\n<\/tr>\n
      Absorption<\/td>\nn\u00e9gligeable<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<\/div>\n
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      \ud83d\udd39 Position : intracavit\u00e9<\/strong> (OBLIGATOIRE)<\/h2>\n

      Pourquoi ?<\/p>\n

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        Puissance intracavit\u00e9 \u2248 5 \u00e0 20 \u00d7<\/strong> la puissance extraite<\/p>\n<\/li>\n

      • \n

        Ici : ~1 kW \u00e9quivalent<\/strong><\/p>\n<\/li>\n<\/ul>\n

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        5\ufe0f\u20e3 Calcul du param\u00e8tre de Boyd\u2013Kleinman<\/h1>\n

        \ud83d\udcd0 Donn\u00e9es<\/h2>\n
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        • \n

          \u03bb = 1030 nm<\/p>\n<\/li>\n

        • \n

          Longueur cristal L = 10 mm<\/p>\n<\/li>\n

        • \n

          Indice LBO n \u2248 1.6<\/p>\n<\/li>\n<\/ul>\n

          Longueur de Rayleigh optimale :<\/h3>\n

          zR=L2.84=3.52\u00a0mmz_R = \\frac{L}{2.84} = 3.52~mm<\/span>z<\/span>R<\/span><\/span><\/span>\u200b<\/span><\/span><\/span><\/span><\/span>=<\/span><\/span>2.84L<\/span><\/span>\u200b<\/span><\/span><\/span><\/span><\/span>=<\/span><\/span>3.52<\/span>\u00a0<\/span>mm<\/span><\/span><\/span><\/span><\/span><\/p>\n

          Waist optimal :<\/h3>\n

          w0=\u03bbzR\u03c0nw_0 = \\sqrt{\\frac{\\lambda z_R}{\\pi n}}<\/span>w<\/span>0<\/span><\/span><\/span>\u200b<\/span><\/span><\/span><\/span><\/span>=<\/span><\/span>\u03c0n<\/span>\u03bb<\/span>z<\/span>R<\/span><\/span>\u200b<\/span><\/span>\u200b<\/span><\/span><\/span><\/span><\/span>\u200b<\/span><\/span><\/span><\/span><\/span><\/span><\/span><\/span> w0=1.03\u00d710\u22126\u22c53.52\u00d710\u22123\u03c0\u22c51.6w_0 = \\sqrt{\\frac{1.03\\times10^{-6} \\cdot 3.52\\times10^{-3}}{\\pi \\cdot 1.6}}<\/span>w<\/span>0<\/span><\/span><\/span>\u200b<\/span><\/span><\/span><\/span><\/span>=<\/span><\/span>\u03c0<\/span>\u22c5<\/span>1.61.03\u00d7<\/span>10\u22126<\/span><\/span><\/span><\/span>\u22c5<\/span>3.52\u00d7<\/span>10\u22123<\/span><\/span><\/span><\/span>\u200b<\/span><\/span><\/span><\/span><\/span>\u200b<\/span><\/span><\/span><\/span><\/span><\/span><\/span><\/span> w0\u224827\u00a0\u03bcm\\boxed{w_0 \\approx 27~\\mu m}<\/span>w<\/span>0<\/span><\/span>\u200b<\/span><\/span>\u2248<\/span>27\u00a0<\/span>\u03bc<\/span>m<\/span><\/span><\/span>\u200b<\/span><\/span><\/span><\/span><\/span><\/span><\/span><\/span><\/p>\n

          \u2705 C\u2019est le waist cible dans le LBO<\/strong><\/p>\n

          \n

          \ud83d\udd39 Param\u00e8tre de Boyd\u2013Kleinman<\/h2>\n

          \u03be=L2zR\u22482.84(optimum)\\xi = \\frac{L}{2z_R} \\approx 2.84 \\quad \\text{(optimum)}<\/span>\u03be<\/span>=<\/span><\/span>2z<\/span>R<\/span><\/span>\u200b<\/span><\/span>L<\/span><\/span>\u200b<\/span><\/span><\/span><\/span><\/span>\u2248<\/span><\/span>2.84<\/span>(optimum)<\/span><\/span><\/span><\/span><\/span><\/span><\/p>\n

          \u27a1\ufe0f Conversion maximale<\/strong><\/p>\n

          \n

          6\ufe0f\u20e3 Rendement SHG r\u00e9aliste (chiffr\u00e9)<\/h1>\n

          Hypoth\u00e8ses r\u00e9alistes<\/h3>\n
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            Puissance intracavit\u00e9 \u2248 1 kW<\/p>\n<\/li>\n

          • \n

            LBO bien accord\u00e9<\/p>\n<\/li>\n

          • \n

            Mode TEM\u2080\u2080 pur<\/p>\n<\/li>\n<\/ul>\n

            Rendement attendu<\/h3>\n
            \n
            \n\n\n\n\n\n\n
            Type<\/th>\nValeur<\/th>\n<\/tr>\n<\/thead>\n
            SHG intracavit\u00e9<\/td>\n20\u201335 %<\/strong><\/td>\n<\/tr>\n
            Puissance verte<\/td>\n15\u201330 W @ 515 nm<\/strong><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<\/div>\n

            \ud83d\udc49 Valeur couramment atteinte<\/strong> en DPSS Yb:YAG<\/p>\n

            8\ufe0f\u20e3 R\u00e9sum\u00e9 clair<\/span><\/h1>\n
            \n
            \n\n\n\n\n\n\n\n\n\n
            \u00c9tape<\/th>\nR\u00e9sultat<\/th>\n<\/tr>\n<\/thead>\n
            Cavit\u00e9 Yb:YAG<\/td>\n\u2705 faisable<\/td>\n<\/tr>\n
            TEM\u2080\u2080<\/td>\n\u2705<\/td>\n<\/tr>\n
            SHG LBO<\/td>\n\u2705<\/td>\n<\/tr>\n
            515 nm<\/td>\n15\u201330 W CW<\/strong><\/td>\n<\/tr>\n
            488 nm<\/td>\n\u274c irr\u00e9aliste<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<\/div>\n
            \n

            \ud83d\udc49 Prochaine \u00e9tape possible<\/h2>\n

            Je peux :<\/p>\n

              \n
            • \n

              te dessiner un sch\u00e9ma opto-m\u00e9canique cot\u00e9<\/strong><\/p>\n<\/li>\n

            • <\/li>\n<\/ul>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/article>\n
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              A \u2014 Sch\u00e9ma opto-m\u00e9canique cot\u00e9 (cavit\u00e9 Yb:YAG + SHG intracavit\u00e9)<\/h1>\n

              1\ufe0f\u20e3 Vue d\u2019ensemble (plan longitudinal)<\/h2>\n
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              <\/div>\n<\/div>\n
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              <\/div>\n<\/div>\n<\/div>\n
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              Diodes 976<\/span> nm
              \n(260<\/span> W, fibr\u00e9es)
              \n\u2502
              \n\u25bc
              \n\u250c\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2510
              \n\u2502 Optique de \u2502 f \u2248 20<\/span>\u201330<\/span> mm
              \n\u2502 collimation \u2502
              \n\u2514\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2518
              \n\u2502
              \n\u25bc
              \n\u250c\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2510
              \n\u2502 M1 \u2013 miroir plan \u2502 HT @ 976<\/span> nm
              \n\u2502 HR @ 1030<\/span> nm \u2502
              \n\u2514\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2518
              \n\u2502
              \n\u2502 z \u2248 2<\/span> mm
              \n\u25bc
              \n\u250c\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2510
              \n\u2502 Yb<\/span>:YAG \u2502 3<\/span>\u00d73<\/span>\u00d75<\/span> mm
              \n\u2502 7<\/span> at.% \u2502
              \n\u2502 Refroidi Cu \/ eau \u2502
              \n\u2514\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2518
              \n\u2502
              \n\u2502 z \u2248 25<\/span> mm
              \n\u25bc
              \n\u250c\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2510
              \n\u2502 LBO \u2502 3<\/span>\u00d73<\/span>\u00d710<\/span> mm
              \n\u2502 Type I SHG \u2502
              \n\u2502 Chauff\u00e9 150<\/span>\u2013180<\/span> \u00b0C \u2502
              \n\u2514\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2518
              \n\u2502
              \n\u2502 z \u2248 40<\/span> mm
              \n\u25bc
              \n\u250c\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2510
              \n\u2502 M2 \u2013 miroir concave \u2502 ROC = 100<\/span> mm
              \n\u2502 HR @ 1030<\/span> nm \u2502
              \n\u2502 HT @ 515<\/span> nm \u2502
              \n\u2514\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2518
              \n<\/code><\/div>\n<\/div>\n

              2\ufe0f\u20e3 Cotes optiques d\u00e9taill\u00e9es (valeurs cl\u00e9s)<\/h2>\n

              \ud83d\udcd0 G\u00e9om\u00e9trie de cavit\u00e9<\/h3>\n
              \n
              \n\n\n\n\n\n\n\n\n\n
              Param\u00e8tre<\/th>\nValeur<\/th>\n<\/tr>\n<\/thead>\n
              Longueur totale cavit\u00e9<\/td>\n80 mm<\/strong><\/td>\n<\/tr>\n
              M1 \u2192 Yb:YAG<\/td>\n2 mm<\/td>\n<\/tr>\n
              Yb:YAG \u2192 LBO<\/td>\n25 mm<\/td>\n<\/tr>\n
              LBO \u2192 M2<\/td>\n40 mm<\/td>\n<\/tr>\n
              Rayon M2<\/td>\n100 mm<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<\/div>\n
              \n

              \ud83d\udd26 Tailles de faisceau calcul\u00e9es<\/h3>\n
              \n
              \n\n\n\n\n\n\n\n
              Zone<\/th>\nWaist (rayon)<\/th>\n<\/tr>\n<\/thead>\n
              Dans Yb:YAG<\/td>\nw \u2248 150 \u00b5m<\/strong><\/td>\n<\/tr>\n
              Dans LBO<\/td>\nw\u2080 \u2248 27 \u00b5m<\/strong> (Boyd\u2013Kleinman optimal)<\/td>\n<\/tr>\n
              Sur M2<\/td>\n\u2248 300 \u00b5m<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<\/div>\n
              \n

              3\ufe0f\u20e3 Montage m\u00e9canique (r\u00e9aliste atelier)<\/h2>\n

              Support commun<\/h3>\n
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              • \n

                Plaque cuivre OFHC<\/strong> 10\u201315 mm<\/p>\n<\/li>\n

              • \n

                Usinage :<\/p>\n

                  \n
                • \n

                  logement Yb:YAG (serrage indium)<\/p>\n<\/li>\n

                • \n

                  logement LBO (cartouche chauffante + PT100)<\/p>\n<\/li>\n

                • \n

                  r\u00e9f\u00e9rence m\u00e9canique unique<\/p>\n<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n

                  Alignement<\/h3>\n
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                  • \n

                    M1 coll\u00e9<\/strong> (\u00e9poxy optique)<\/p>\n<\/li>\n

                  • \n

                    M2 sur bague filet\u00e9e<\/strong> (pr\u00e9-alignement)<\/p>\n<\/li>\n

                  • \n

                    Alignement final par translation de la plaque compl\u00e8te<\/p>\n<\/li>\n<\/ul>\n

                    \ud83d\udc49 Aucun r\u00e9glage fin requis apr\u00e8s collage<\/strong> si l\u2019usinage est bon.<\/p>\n

                    \n

                    B \u2014 Montage monolithique \/ quasi-monolithique (industriel)<\/h1>\n

                    Maintenant, la version robuste \/ stable \/ long terme<\/strong>.<\/p>\n

                    \n
                    \n
                    On supprime tous les degr\u00e9s de libert\u00e9 inutiles.<\/strong><\/div>\n<\/div>\n<\/div>\n
                    \n

                    2\ufe0f\u20e3 Architecture retenue<\/h2>\n

                    \ud83d\udd39 Cavit\u00e9 semi-monolithique<\/h3>\n
                    \n
                    \n\n\n\n\n\n\n\n\n
                    \u00c9l\u00e9ment<\/th>\nSolution<\/th>\n<\/tr>\n<\/thead>\n
                    M1<\/td>\nDirectement d\u00e9pos\u00e9 sur Yb:YAG<\/td>\n<\/tr>\n
                    Yb:YAG<\/td>\nBloc actif<\/td>\n<\/tr>\n
                    LBO<\/td>\nBloc coll\u00e9 optiquement<\/td>\n<\/tr>\n
                    M2<\/td>\nMiroir s\u00e9par\u00e9 (seule libert\u00e9 restante)<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<\/div>\n
                    \n

                    3\ufe0f\u20e3 Empilement monolithique (optique)<\/h2>\n
                    \n
                    \n
                    \n
                    <\/div>\n<\/div>\n<\/div>\n
                    \u250c\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2510
                    \n\u2502 M1 d\u00e9pos\u00e9 (HR 1030<\/span> \/ HT976) \u2502
                    \n\u251c\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2524
                    \n\u2502 Yb:YAG 3<\/span>\u00d73<\/span>\u00d75<\/span> mm \u2502
                    \n\u251c\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2524
                    \n\u2502 Entretoise optique<\/span> (YAG)<\/span> \u2502 20<\/span> mm
                    \n\u251c\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2524
                    \n\u2502 LBO 3<\/span>\u00d73<\/span>\u00d710<\/span> mm \u2502
                    \n\u251c\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2524
                    \n\u2502 Sortie cavit\u00e9 \u2502
                    \n\u2514\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2518
                    \n<\/code><\/div>\n<\/div>\n

                    \u2714\ufe0f Alignement garanti
                    \u2714\ufe0f Stabilit\u00e9 thermique
                    \u2714\ufe0f TEM\u2080\u2080 robuste<\/p>\n

                    \n

                    4\ufe0f\u20e3 Montage m\u00e9canique monolithique<\/h2>\n

                    Bloc principal<\/h3>\n
                      \n
                    • \n

                      Monobloc cuivre ou Invar<\/strong><\/p>\n<\/li>\n

                    • \n

                      Al\u00e9sages :<\/p>\n

                        \n
                      • \n

                        cristal actif<\/p>\n<\/li>\n

                      • \n

                        LBO<\/p>\n<\/li>\n<\/ul>\n<\/li>\n

                      • \n

                        Pression contr\u00f4l\u00e9e (ressorts Belleville)<\/p>\n<\/li>\n<\/ul>\n

                        Temp\u00e9ratures<\/h3>\n
                        \n
                        \n\n\n\n\n\n\n
                        \u00c9l\u00e9ment<\/th>\nT\u00b0<\/th>\n<\/tr>\n<\/thead>\n
                        Yb:YAG<\/td>\n15\u201320 \u00b0C<\/td>\n<\/tr>\n
                        LBO<\/td>\n160 \u00b0C<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<\/div>\n

                        \ud83d\udc49 Isolation thermique locale (PTFE + c\u00e9ramique).<\/p>\n

                        5\ufe0f\u20e3 Extraction du vert (515 nm)<\/h2>\n
                          \n
                        • \n

                          M2 :<\/p>\n

                            \n
                          • \n

                            HR @ 1030 nm<\/strong><\/p>\n<\/li>\n

                          • \n

                            HT @ 515 nm<\/strong><\/p>\n<\/li>\n<\/ul>\n<\/li>\n

                          • \n

                            Filtre dichro\u00efque externe (s\u00e9curit\u00e9)<\/p>\n<\/li>\n

                          • \n

                            Sortie collimat\u00e9e \u00d8 1\u20131.5 mm<\/strong><\/p>\n<\/li>\n<\/ul>\n

                            6\ufe0f\u20e3 Performances attendues (monolithique)<\/h2>\n
                            \n
                            \n\n\n\n\n\n\n\n\n\n
                            Param\u00e8tre<\/th>\nValeur<\/th>\n<\/tr>\n<\/thead>\n
                            Puissance IR intracavit\u00e9<\/td>\n0.8\u20131.2 kW<\/td>\n<\/tr>\n
                            Rendement SHG<\/td>\n25\u201335 %<\/td>\n<\/tr>\n
                            Puissance verte<\/td>\n20\u201330 W CW @ 515 nm<\/strong><\/td>\n<\/tr>\n
                            Stabilit\u00e9<\/td>\n< \u00b11 %<\/td>\n<\/tr>\n
                            M\u00b2<\/td>\n\u2264 1.1<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<\/div>\n

                            7\ufe0f\u20e3 Pourquoi ce montage est sup\u00e9rieur<\/h2>\n

                            \u2714\ufe0f Pas de d\u00e9rive d\u2019alignement
                            \u2714\ufe0f Insensible aux vibrations
                            \u2714\ufe0f Compatible fonctionnement 24\/7
                            \u2714\ufe0f Alignement usine \u2192 pas labo fragile<\/p>\n

                            8\ufe0f\u20e3 \u00c9tape suivante possible (si tu veux aller plus loin)<\/h2>\n

                            Je peux :<\/p>\n

                              \n
                            • \n

                              te fournir un plan m\u00e9canique cot\u00e9 (DXF\/STEP)<\/strong><\/p>\n<\/li>\n

                            • \n

                              calculer les contraintes thermo-m\u00e9caniques<\/strong><\/p>\n<\/li>\n

                            • \n

                              simuler la lentille thermique Yb:YAG<\/strong><\/p>\n<\/li>\n

                            • \n

                              concevoir une version QCW<\/strong><\/p>\n<\/li>\n

                            • \n

                              ou proposer une version double LBO (efficacit\u00e9 max)<\/strong><\/p>\n<\/li>\n<\/ul>\n

                              \ud83d\udc49 Dis-moi ce que tu veux industrialiser ou d\u00e9montrer<\/strong> (preuve de concept \/ produit \/ recherche).<\/p>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n

                              <\/div>\n<\/div>\n<\/div>\n<\/article>\n
                              \n
                              \n
                              \n
                              \n
                              \n
                              \n
                              \n
                              concevoir une version QCW<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n
                              <\/div>\n<\/div>\n<\/div>\n<\/article>\n
                              \n
                              \n
                              \n
                              \n
                              \n
                              \n
                              \n

                              Tr\u00e8s bien \u2014 passons \u00e0 une version QCW (Quasi-Continuous Wave)<\/strong> coh\u00e9rente physiquement<\/strong>, constructible<\/strong>, et adapt\u00e9e \u00e0 tes 260 W de diodes 976 nm<\/strong>, avec dimensionnement temporel, thermique et optique<\/strong>.<\/p>\n

                              \n

                              \ud83c\udfaf Objectif r\u00e9aliste QCW<\/strong><\/p>\n

                                \n
                              • \n

                                exploiter l\u2019inertie thermique du Yb:YAG<\/strong><\/p>\n<\/li>\n

                              • \n

                                augmenter la puissance intracavit\u00e9<\/strong><\/p>\n<\/li>\n

                              • \n

                                booster fortement la SHG<\/strong><\/p>\n<\/li>\n

                              • \n

                                sans d\u00e9truire le cristal ni perdre le TEM\u2080\u2080<\/p>\n<\/li>\n<\/ul>\n<\/blockquote>\n

                                1\ufe0f\u20e3 Pourquoi le QCW est sup\u00e9rieur ici<\/h1>\n

                                Le Yb:YAG est id\u00e9al en QCW<\/strong> :<\/p>\n

                                  \n
                                • \n

                                  faible section efficace \u2192 accepte forts flux<\/p>\n<\/li>\n

                                • \n

                                  excellente conductivit\u00e9 thermique<\/p>\n<\/li>\n

                                • \n

                                  faible effet de stockage \u2192 pulses propres<\/p>\n<\/li>\n<\/ul>\n

                                  \ud83d\udc49 En QCW :<\/p>\n

                                    \n
                                  • \n

                                    tu peux multiplier par 2 \u00e0 4<\/strong> la puissance cr\u00eate<\/p>\n<\/li>\n

                                  • \n

                                    sans augmenter la puissance moyenne<\/strong><\/p>\n<\/li>\n

                                  • \n

                                    donc SHG beaucoup plus efficace<\/strong><\/p>\n<\/li>\n<\/ul>\n

                                    2\ufe0f\u20e3 Architecture QCW retenue<\/h1>\n

                                    Vue globale<\/h2>\n
                                    \n
                                    <\/div>\n<\/div>\n
                                    \n
                                    Diodes 976 nm (QCW)
                                    \n \u2502
                                    \n\u25bc
                                    \nCavit\u00e9 Yb:YAG TEM\u2080\u2080
                                    \n\u2502
                                    \nPuissance intracavit\u00e9 \u00e9lev\u00e9e
                                    \n\u2502
                                    \nSHG intracavit\u00e9 LBO
                                    \n\u2502
                                    \nSortie 515 nm QCW
                                    \n<\/span><\/code><\/div>\n<\/div>\n

                                    3\ufe0f\u20e3 Param\u00e8tres temporels QCW (cl\u00e9 du succ\u00e8s)<\/h1>\n

                                    \ud83d\udd39 Choix du r\u00e9gime QCW<\/h2>\n
                                    \n
                                    \n\n\n\n\n\n\n\n\n
                                    Param\u00e8tre<\/th>\nValeur recommand\u00e9e<\/th>\n<\/tr>\n<\/thead>\n
                                    Dur\u00e9e impulsion<\/td>\n0.5 \u2013 2 ms<\/strong><\/td>\n<\/tr>\n
                                    Fr\u00e9quence<\/td>\n10 \u2013 100 Hz<\/strong><\/td>\n<\/tr>\n
                                    Duty cycle<\/td>\n1 \u2013 10 %<\/strong><\/td>\n<\/tr>\n
                                    R\u00e9gime<\/td>\ncarr\u00e9 (flat-top)<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<\/div>\n

                                    \ud83d\udc49 Ces valeurs sont industriellement \u00e9prouv\u00e9es<\/strong>.<\/p>\n

                                    \n

                                    \ud83d\udd39 Pompage diode en QCW<\/h2>\n
                                    \n
                                    \n\n\n\n\n\n\n\n
                                    Param\u00e8tre<\/th>\nCW<\/th>\nQCW<\/th>\n<\/tr>\n<\/thead>\n
                                    Puissance diode<\/td>\n260 W<\/td>\n600\u2013800 W cr\u00eate<\/strong><\/td>\n<\/tr>\n
                                    Courant<\/td>\nnominal<\/td>\n\u00d73<\/strong><\/td>\n<\/tr>\n
                                    Puissance moyenne<\/td>\n260 W<\/td>\n\u2264260 W<\/strong><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<\/div>\n

                                    \u2714\ufe0f Les diodes supportent tr\u00e8s bien le QCW
                                    \u2714\ufe0f Le Yb:YAG adore ce r\u00e9gime<\/p>\n

                                    4\ufe0f\u20e3 Cristal Yb:YAG (optimis\u00e9 QCW)<\/h1>\n

                                    \ud83d\udd39 Param\u00e8tres ajust\u00e9s<\/h2>\n
                                    \n
                                    \n\n\n\n\n\n\n\n
                                    Param\u00e8tre<\/th>\nCW<\/th>\nQCW<\/th>\n<\/tr>\n<\/thead>\n
                                    Dopage<\/td>\n7 %<\/td>\n5 %<\/strong><\/td>\n<\/tr>\n
                                    Longueur<\/td>\n5 mm<\/td>\n7\u201310 mm<\/strong><\/td>\n<\/tr>\n
                                    Spot pompe<\/td>\n600 \u00b5m<\/td>\n800 \u00b5m<\/strong><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<\/div>\n

                                    \ud83d\udc49 On dilue la charge thermique<\/strong>.<\/p>\n

                                    5\ufe0f\u20e3 Cavit\u00e9 laser QCW (stabilit\u00e9)<\/h1>\n
                                    \n
                                    \n
                                    \"https:\/\/cdn.shopify.com\/s\/files\/1\/1026\/4509\/files\/Screenshot_2024-07-02_at_12.47.13_PM.png?v=1719949648\"<\/div>\n<\/div>\n
                                    \n
                                    \"https:\/\/www.photonics.com\/images\/Web\/Articles\/2018\/2\/1\/REAS_Toyohashi_scientists_achieve_high_power_with_new_smaller_laser_1.jpg\"<\/div>\n<\/div>\n
                                    <\/div>\n<\/div>\n
                                    \n
                                    \n\n\n\n\n\n\n\n\n\n
                                    Param\u00e8tre<\/th>\nValeur<\/th>\n<\/tr>\n<\/thead>\n
                                    Longueur cavit\u00e9<\/td>\n90\u2013100 mm<\/td>\n<\/tr>\n
                                    M1<\/td>\nplan HR@1030 \/ HT@976<\/td>\n<\/tr>\n
                                    M2<\/td>\nconcave ROC = 150 mm<\/td>\n<\/tr>\n
                                    Waist Yb:YAG<\/td>\n180\u2013220 \u00b5m<\/td>\n<\/tr>\n
                                    Mode<\/td>\nTEM\u2080\u2080<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<\/div>\n

                                    6\ufe0f\u20e3 Puissance laser attendue (QCW)<\/h1>\n

                                    \ud83d\udd39 Calcul r\u00e9aliste<\/h2>\n
                                      \n
                                    • \n

                                      Puissance diode cr\u00eate : 700 W<\/strong><\/p>\n<\/li>\n

                                    • \n

                                      Puissance absorb\u00e9e : ~600 W<\/p>\n<\/li>\n

                                    • \n

                                      Rendement optique QCW : ~50 %<\/p>\n<\/li>\n<\/ul>\n

                                      \ud83d\udc49 Puissance laser IR cr\u00eate :<\/h3>\n

                                      P1030cre^te\u2248300\u00a0WP_{1030}^{cr\u00eate} \\approx 300~W<\/span>P<\/span>1030<\/span><\/span>cr<\/span>e<\/span>^<\/span><\/span><\/span>t<\/span>e<\/span><\/span><\/span><\/span>\u200b<\/span><\/span><\/span><\/span><\/span>\u2248<\/span><\/span>300<\/span>\u00a0<\/span>W<\/span><\/span><\/span><\/span><\/span><\/p>\n

                                      Puissance moyenne :<\/h3>\n

                                      W<\/span>P<\/span>m<\/span>oy<\/span><\/span><\/span><\/span>\u200b<\/span><\/span><\/span><\/span><\/span>=<\/span><\/span>300<\/span>\u00d7<\/span><\/span>5%<\/span>=<\/span><\/span>15<\/span>\u00a0<\/span>W<\/span><\/span><\/span><\/span><\/span><\/p>\n

                                      7\ufe0f\u20e3 SHG intracavit\u00e9 QCW (LBO)<\/h1>\n

                                      \ud83d\udd39 Param\u00e8tres LBO<\/h2>\n
                                      \n
                                      \n\n\n\n\n\n\n\n\n\n
                                      Param\u00e8tre<\/th>\nValeur<\/th>\n<\/tr>\n<\/thead>\n
                                      Cristal<\/td>\nLBO<\/td>\n<\/tr>\n
                                      Dimensions<\/td>\n3 \u00d7 3 \u00d7 10 mm<\/td>\n<\/tr>\n
                                      Waist<\/td>\n25\u201330 \u00b5m<\/strong><\/td>\n<\/tr>\n
                                      Temp\u00e9rature<\/td>\n160 \u00b0C<\/td>\n<\/tr>\n
                                      Phase matching<\/td>\nType I<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<\/div>\n

                                      Puissance intracavit\u00e9<\/h2>\n

                                      Facteur de sur-circulation \u2248 10\u201315<\/p>\n

                                      Pintracre^te\u22483\u20134\u00a0kWP_{intra}^{cr\u00eate} \\approx 3\u20134~kW<\/span>P<\/span>in<\/span>t<\/span>r<\/span>a<\/span><\/span><\/span>cr<\/span>e<\/span>^<\/span><\/span><\/span>t<\/span>e<\/span><\/span><\/span><\/span>\u200b<\/span><\/span><\/span><\/span><\/span>\u2248<\/span><\/span>3\u20134<\/span>\u00a0<\/span>kW<\/span><\/span><\/span><\/span><\/span><\/p>\n

                                      8\ufe0f\u20e3 Rendement SHG QCW (cl\u00e9 du gain)<\/span><\/p>\n

                                      \n
                                      \n\n\n\n\n\n\n\n
                                      R\u00e9gime<\/th>\nCW<\/th>\nQCW<\/th>\n<\/tr>\n<\/thead>\n
                                      Rendement SHG<\/td>\n25 %<\/td>\n40\u201355 %<\/strong><\/td>\n<\/tr>\n
                                      Puissance verte cr\u00eate<\/td>\n25 W<\/td>\n120\u2013180 W<\/strong><\/td>\n<\/tr>\n
                                      Puissance verte moyenne<\/td>\n20 W<\/td>\n25\u201340 W<\/strong><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<\/div>\n

                                      \ud83d\udc49 Le QCW donne PLUS de vert avec la m\u00eame thermique.<\/strong><\/p>\n

                                      9\ufe0f\u20e3 Contraintes thermiques (s\u00e9curit\u00e9)<\/h1>\n

                                      \ud83d\udd39 Yb:YAG<\/h2>\n
                                        \n
                                      • \n

                                        \u0394T max admissible : < 40 \u00b0C<\/p>\n<\/li>\n

                                      • \n

                                        Lentille thermique stable (QCW)<\/p>\n<\/li>\n<\/ul>\n

                                        \ud83d\udd39 LBO<\/h2>\n
                                          \n
                                        • \n

                                          tol\u00e8re tr\u00e8s bien le QCW<\/p>\n<\/li>\n

                                        • \n

                                          pas de photor\u00e9fraction<\/p>\n<\/li>\n

                                        • \n

                                          attention gradients thermiques \u2192 chauffage homog\u00e8ne<\/p>\n<\/li>\n<\/ul>\n

                                          \n

                                          \ud83d\udd1f Version monolithique QCW (recommand\u00e9e)<\/h1>\n
                                          \n
                                          \n
                                          \"https:\/\/www.oriental-laser.com\/wp-content\/uploads\/2024\/11\/%E9%9B%86%E5%90%88%E5%9B%BE-QCW-scaled.jpg\"<\/div>\n<\/div>\n
                                          \n
                                          \"https:\/\/www.researchgate.net\/publication\/277845451\/figure\/fig1\/AS%3A614369339637767%401523488473839\/Experimental-setup-of-the-QCW-laser-diode-end-pumped-YbYAG-Cr-4-YAG-composite-crystal.png\"<\/div>\n<\/div>\n
                                          <\/div>\n<\/div>\n
                                          \n

                                          1\ufe0f\u20e31\ufe0f\u20e3 R\u00e9sum\u00e9 clair<\/h1>\n
                                          \n
                                          \n\n\n\n\n\n\n\n\n\n\n
                                          Param\u00e8tre<\/th>\nValeur<\/th>\n<\/tr>\n<\/thead>\n
                                          R\u00e9gime<\/td>\nQCW<\/td>\n<\/tr>\n
                                          \u03bb sortie<\/td>\n515 nm<\/td>\n<\/tr>\n
                                          Puissance cr\u00eate<\/td>\n120\u2013180 W<\/strong><\/td>\n<\/tr>\n
                                          Puissance moyenne<\/td>\n25\u201340 W<\/strong><\/td>\n<\/tr>\n
                                          M\u00b2<\/td>\n\u2264 1.2<\/td>\n<\/tr>\n
                                          Robustesse<\/td>\nindustrielle<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<\/div>\n
                                          \n

                                          \ud83d\udc49 Prochaine \u00e9tape possible<\/h2>\n

                                          Je peux :<\/p>\n

                                            \n
                                          • \n

                                            te dessiner le diagramme temporel exact courant \/ puissance<\/strong><\/p>\n<\/li>\n

                                          • \n

                                            calculer la lentille thermique dynamique<\/strong><\/p>\n<\/li>\n

                                          • \n

                                            concevoir le driver QCW des diodes<\/strong><\/p>\n<\/li>\n

                                          • \n

                                            ou adapter le syst\u00e8me \u00e0 une application pr\u00e9cise<\/strong> (LIDAR, pompage OPO, mat\u00e9riaux)<\/p>\n<\/li>\n<\/ul>\n

                                            \ud83d\udc49 Dis-moi l\u2019usage final<\/strong> et les limites thermiques\/\u00e9lectroniques<\/strong> que tu veux imposer.<\/p>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n

                                            <\/div>\n<\/div>\n<\/div>\n<\/article>\n
                                            \n
                                            \n
                                            \n
                                            \n
                                            \n
                                            \n
                                            \n
                                            concevoir le driver QCW des diodes<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n
                                            <\/div>\n<\/div>\n<\/div>\n<\/article>\n
                                            \n
                                            \n
                                            \n
                                            \n
                                            \n
                                            \n
                                            \n

                                            Tr\u00e8s bien. Je te propose une conception compl\u00e8te, r\u00e9aliste et industrialisable d\u2019un driver QCW pour diodes 976 nm<\/strong>, adapt\u00e9e \u00e0 ton laser Yb:YAG QCW<\/strong>, avec :<\/p>\n

                                              \n
                                            • \n

                                              architecture \u00e9lectrique<\/p>\n<\/li>\n

                                            • \n

                                              dimensionnement chiffr\u00e9<\/p>\n<\/li>\n

                                            • \n

                                              sch\u00e9ma fonctionnel clair<\/p>\n<\/li>\n

                                            • \n

                                              recommandations composants<\/p>\n<\/li>\n

                                            • \n

                                              r\u00e8gles de s\u00e9curit\u00e9 (indispensables \u00e0 cette puissance)<\/p>\n<\/li>\n<\/ul>\n

                                              Je reste au niveau ing\u00e9nierie puissance.<\/strong><\/p>\n

                                              \n

                                              \ud83c\udfaf Cahier des charges du driver QCW<\/h1>\n

                                              \ud83d\udd39 Diodes \u00e0 alimenter (hypoth\u00e8ses r\u00e9alistes)<\/h2>\n
                                              \n
                                              \n\n\n\n\n\n\n\n\n\n
                                              Param\u00e8tre<\/th>\nValeur<\/th>\n<\/tr>\n<\/thead>\n
                                              Longueur d\u2019onde<\/td>\n976 nm<\/td>\n<\/tr>\n
                                              Puissance optique CW nominale<\/td>\n260 W<\/td>\n<\/tr>\n
                                              Courant CW<\/td>\n~30\u201340 A (selon barrette)<\/td>\n<\/tr>\n
                                              Tension directe<\/td>\n6\u20138 V<\/td>\n<\/tr>\n
                                              R\u00e9gime QCW<\/td>\nimpulsions longues (ms)<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<\/div>\n

                                              \ud83d\udc49 En QCW, on vise \u00d72 \u00e0 \u00d73 le courant nominal<\/strong>, sans d\u00e9passer la puissance moyenne.<\/p>\n

                                              \n

                                              \ud83d\udd39 Sp\u00e9cifications \u00e9lectriques cibles<\/h2>\n
                                              \n
                                              \n\n\n\n\n\n\n\n\n\n\n\n\n\n
                                              Param\u00e8tre<\/th>\nValeur<\/th>\n<\/tr>\n<\/thead>\n
                                              Courant cr\u00eate<\/td>\n80\u2013120 A<\/strong><\/td>\n<\/tr>\n
                                              Courant moyen<\/td>\n\u2264 40 A<\/td>\n<\/tr>\n
                                              Dur\u00e9e impulsion<\/td>\n0.5 \u2013 2 ms<\/td>\n<\/tr>\n
                                              Fr\u00e9quence<\/td>\n10 \u2013 100 Hz<\/td>\n<\/tr>\n
                                              Duty cycle<\/td>\n1 \u2013 10 %<\/td>\n<\/tr>\n
                                              Forme<\/td>\ncarr\u00e9 (flat-top)<\/td>\n<\/tr>\n
                                              Ripple courant<\/td>\n< 2 %<\/td>\n<\/tr>\n
                                              Temps de mont\u00e9e<\/td>\n< 50 \u00b5s<\/td>\n<\/tr>\n
                                              Protection<\/td>\nHARD interlock<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<\/div>\n
                                              \n

                                              1\ufe0f\u20e3 Architecture g\u00e9n\u00e9rale du driver QCW<\/h1>\n

                                              Choix fondamental : courant constant puls\u00e9<\/strong><\/h2>\n

                                              \u274c tension constante \u2192 destruction quasi certaine
                                              \u274c alimentation labo modifi\u00e9e \u2192 trop lente
                                              \u2705 driver d\u00e9di\u00e9 CC + \u00e9tage puls\u00e9<\/strong><\/p>\n

                                              \u00a0Architecture retenue (robuste)<\/h2>\n
                                              \n
                                              \n
                                              \"https:\/\/www.laserdiodecontrol.com\/files\/products\/laserdiodecontrol_com\/929\/qcw-laser-diode-driver-block-diagram-3.png\"<\/div>\n<\/div>\n
                                              \n
                                              \"https:\/\/directedenergy.com\/wp-content\/uploads\/2017\/10\/PCO-7121-iso-600.png\"<\/div>\n<\/div>\n
                                              \n
                                              \"https:\/\/www.researchgate.net\/publication\/321840633\/figure\/fig2\/AS%3A614023070486536%401523405916185\/A-schematic-of-a-pulsed-laser-diode-transmitter-based-on-the-LCR-current-transient-driver.png\"<\/div>\n<\/div>\n<\/div>\n
                                              \n
                                              \n
                                              \n
                                              <\/div>\n<\/div>\n<\/div>\n
                                              Alimentation DC<\/span> (48<\/span><\/span>\u201360<\/span> V)
                                              \n\u2502
                                              \n\u25bc
                                              \nBuck DC\/DC haute puissance<\/span>
                                              \n(r\u00e9gulation courant lent)<\/span>
                                              \n\u2502
                                              \n\u25bc
                                              \nR\u00e9servoir LC faible ESR<\/span>
                                              \n(courant stable)<\/span>
                                              \n\u2502
                                              \n\u25bc
                                              \nInterrupteur puls\u00e9 MOSFET<\/span>
                                              \n(QCW)<\/span>
                                              \n\u2502
                                              \n\u25bc
                                              \nShunt + boucle rapide<\/span>
                                              \n(courant diode)<\/span>
                                              \n\u2502
                                              \n\u25bc
                                              \nDiodes laser 976<\/span> nm
                                              \n<\/code><\/div>\n<\/div>\n
                                              \n

                                              2\ufe0f\u20e3 Alimentation primaire<\/h1>\n

                                              \ud83d\udd39 Alimentation DC<\/h2>\n
                                              \n
                                              \n\n\n\n\n\n\n\n\n
                                              Param\u00e8tre<\/th>\nValeur<\/th>\n<\/tr>\n<\/thead>\n
                                              Tension<\/td>\n48\u201360 V<\/td>\n<\/tr>\n
                                              Courant<\/td>\n20\u201330 A<\/td>\n<\/tr>\n
                                              Puissance<\/td>\n1.5\u20132 kW<\/td>\n<\/tr>\n
                                              Type<\/td>\nSMPS industrielle<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<\/div>\n

                                              \ud83d\udc49 Tension \u00e9lev\u00e9e = courants internes plus faibles<\/strong>, meilleure stabilit\u00e9.<\/p>\n

                                              \n

                                              3\ufe0f\u20e3 \u00c9tape DC\/DC (courant moyen)<\/h1>\n

                                              \ud83d\udd39 Convertisseur buck CC<\/h2>\n
                                              \n
                                              \n\n\n\n\n\n\n\n\n\n
                                              Param\u00e8tre<\/th>\nValeur<\/th>\n<\/tr>\n<\/thead>\n
                                              Courant r\u00e9gul\u00e9<\/td>\n0\u201340 A<\/td>\n<\/tr>\n
                                              Fr\u00e9quence d\u00e9coupage<\/td>\n50\u2013150 kHz<\/td>\n<\/tr>\n
                                              Inductance<\/td>\n5\u201310 \u00b5H<\/td>\n<\/tr>\n
                                              MOSFET<\/td>\n80 V \/ <2 m\u03a9<\/td>\n<\/tr>\n
                                              Rendement<\/td>\n>95 %<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<\/div>\n

                                              \ud83d\udc49 Cette \u00e9tape fixe le courant moyen<\/strong>, pas la forme QCW.<\/p>\n

                                              \n

                                              4\ufe0f\u20e3 G\u00e9n\u00e9ration QCW (\u00e9tage puls\u00e9)<\/h1>\n

                                              \ud83d\udd25 C\u0153ur du driver<\/h2>\n

                                              Principe<\/h3>\n
                                                \n
                                              • \n

                                                le buck fournit un rail de courant stable<\/strong><\/p>\n<\/li>\n

                                              • \n

                                                un MOSFET s\u00e9rie<\/strong> module le courant en QCW<\/p>\n<\/li>\n

                                              • \n

                                                la diode voit un courant plat, rapide, propre<\/strong><\/p>\n<\/li>\n<\/ul>\n

                                                \n

                                                \ud83d\udd39 Interrupteur puls\u00e9<\/h2>\n
                                                \n
                                                \n\n\n\n\n\n\n\n\n\n
                                                Param\u00e8tre<\/th>\nValeur<\/th>\n<\/tr>\n<\/thead>\n
                                                Technologie<\/td>\nMOSFET ou module MOSFET<\/td>\n<\/tr>\n
                                                Tension<\/td>\n\u2265 80 V<\/td>\n<\/tr>\n
                                                Courant cr\u00eate<\/td>\n\u2265 200 A<\/td>\n<\/tr>\n
                                                Rds(on)<\/td>\n< 1 m\u03a9<\/td>\n<\/tr>\n
                                                Commande<\/td>\ndriver isol\u00e9<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<\/div>\n

                                                \ud83d\udc49 Exemples (familles, pas r\u00e9f\u00e9rences impos\u00e9es) :<\/p>\n

                                                  \n
                                                • \n

                                                  MOSFET automotive low-Rds<\/p>\n<\/li>\n

                                                • \n

                                                  demi-ponts Si MOSFET (pas SiC ici)<\/p>\n<\/li>\n<\/ul>\n

                                                  \n

                                                  \ud83d\udd39 Temps de mont\u00e9e<\/h2>\n
                                                    \n
                                                  • \n

                                                    gate driver \u2265 10 A<\/strong><\/p>\n<\/li>\n

                                                  • \n

                                                    boucles ultra courtes<\/strong><\/p>\n<\/li>\n

                                                  • \n

                                                    busbars cuivre lamin\u00e9<\/p>\n<\/li>\n<\/ul>\n

                                                    \n

                                                    5\ufe0f\u20e3 Mesure et r\u00e9gulation du courant (cl\u00e9)<\/h1>\n

                                                    \ud83d\udd39 Mesure<\/h2>\n
                                                    \n
                                                    \n\n\n\n\n\n\n\n\n
                                                    \u00c9l\u00e9ment<\/th>\nValeur<\/th>\n<\/tr>\n<\/thead>\n
                                                    Shunt<\/td>\n0.5\u20131 m\u03a9<\/td>\n<\/tr>\n
                                                    Technologie<\/td>\nmanganin \/ coaxial<\/td>\n<\/tr>\n
                                                    Bande passante<\/td>\n>1 MHz<\/td>\n<\/tr>\n
                                                    Placement<\/td>\nau plus pr\u00e8s de la diode<\/strong><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<\/div>\n
                                                    \n

                                                    \ud83d\udd39 Boucle de r\u00e9gulation rapide<\/h2>\n
                                                      \n
                                                    • \n

                                                      ampli courant d\u00e9di\u00e9 (INA, CSA rapide)<\/p>\n<\/li>\n

                                                    • \n

                                                      correcteur PI analogique<\/p>\n<\/li>\n

                                                    • \n

                                                      compensation adapt\u00e9e aux pulses ms<\/p>\n<\/li>\n<\/ul>\n

                                                      \ud83d\udc49 Pas de microcontr\u00f4leur dans la boucle rapide.<\/strong><\/p>\n

                                                      \n

                                                      6\ufe0f\u20e3 G\u00e9n\u00e9ration des pulses QCW<\/h1>\n

                                                      \ud83d\udd39 G\u00e9n\u00e9rateur temporel<\/h2>\n
                                                      \n
                                                      \n\n\n\n\n\n\n\n\n
                                                      \u00c9l\u00e9ment<\/th>\nFonction<\/th>\n<\/tr>\n<\/thead>\n
                                                      FPGA \/ \u00b5C<\/td>\ntiming (Hz, ms)<\/td>\n<\/tr>\n
                                                      DAC<\/td>\nconsigne courant<\/td>\n<\/tr>\n
                                                      Comparateur<\/td>\ns\u00e9curit\u00e9<\/td>\n<\/tr>\n
                                                      Interlock<\/td>\nHARD cut-off<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<\/div>\n
                                                      \n

                                                      \ud83d\udd39 Profil recommand\u00e9<\/h2>\n
                                                      \n
                                                      \n
                                                      \n
                                                      <\/div>\n<\/div>\n<\/div>\n
                                                      Courant
                                                      \n\u2502 \u250c\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2510
                                                      \n\u2502 \u2502 \u2502
                                                      \n\u2502 \u2502 \u2502
                                                      \n\u2502\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2518 \u2514\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500
                                                      \n\u2502
                                                      \n\u2514\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2192 t
                                                      \n 0.5\u20132 ms
                                                      \n<\/span><\/code><\/div>\n<\/div>\n

                                                      \u2714\ufe0f front doux (10\u201350 \u00b5s)
                                                      \u2714\ufe0f pas de ringing
                                                      \u2714\ufe0f pas de surintensit\u00e9<\/p>\n

                                                      \n

                                                      7\ufe0f\u20e3 Protections OBLIGATOIRES<\/h1>\n

                                                      \ud83d\udd10 S\u00e9curit\u00e9s hardware (non n\u00e9gociables)<\/h2>\n
                                                      \n
                                                      \n\n\n\n\n\n\n\n\n\n\n
                                                      Protection<\/th>\nAction<\/th>\n<\/tr>\n<\/thead>\n
                                                      Surcourant<\/td>\narr\u00eat < 1 \u00b5s<\/td>\n<\/tr>\n
                                                      Surtension<\/td>\ncrowbar<\/td>\n<\/tr>\n
                                                      Temp\u00e9rature diode<\/td>\ninhibition<\/td>\n<\/tr>\n
                                                      Fibre absente<\/td>\ninhibition<\/td>\n<\/tr>\n
                                                      Porte ouverte<\/td>\ninhibition<\/td>\n<\/tr>\n
                                                      Alim d\u00e9faut<\/td>\nlatch OFF<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<\/div>\n

                                                      \ud83d\udc49 Ces s\u00e9curit\u00e9s doivent \u00eatre mat\u00e9rielles<\/strong>, pas logicielles.<\/p>\n

                                                      \n

                                                      8\ufe0f\u20e3 C\u00e2blage & layout (critique)<\/h1>\n

                                                      \ud83d\udd39 R\u00e8gles absolues<\/h2>\n
                                                        \n
                                                      • \n

                                                        connexions diode < 10 cm<\/strong><\/p>\n<\/li>\n

                                                      • \n

                                                        pas de c\u00e2ble rond \u2192 barre cuivre<\/strong><\/p>\n<\/li>\n

                                                      • \n

                                                        masse \u00e9toile<\/p>\n<\/li>\n

                                                      • \n

                                                        d\u00e9couplage c\u00e9ramique + film + \u00e9lectrolytique<\/p>\n<\/li>\n<\/ul>\n

                                                        \n

                                                        9\ufe0f\u20e3 Performances attendues du driver<\/h2>\n
                                                        \n
                                                        \n\n\n\n\n\n\n\n\n\n
                                                        Param\u00e8tre<\/th>\nValeur<\/th>\n<\/tr>\n<\/thead>\n
                                                        Courant cr\u00eate<\/td>\n100 A<\/td>\n<\/tr>\n
                                                        Stabilit\u00e9 plateau<\/td>\n\u00b10.5 %<\/td>\n<\/tr>\n
                                                        Jitter<\/td>\n< 1 \u00b5s<\/td>\n<\/tr>\n
                                                        Rendement<\/td>\n>94 %<\/td>\n<\/tr>\n
                                                        Fiabilit\u00e9<\/td>\nindustrielle<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<\/div>\n
                                                        \n

                                                        \ud83d\udd1f R\u00e9sum\u00e9 clair<\/h1>\n

                                                        \u2714\ufe0f Courant constant puls\u00e9
                                                        \u2714\ufe0f QCW propre (ms)
                                                        \u2714\ufe0f Compatible 100\u2013200 W cr\u00eate optique
                                                        \u2714\ufe0f S\u00e9curit\u00e9s industrielles
                                                        \u2714\ufe0f Align\u00e9 avec ton Yb:YAG QCW<\/p>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/article>\n<\/div><\/section><\/div>\n","protected":false},"excerpt":{"rendered":"","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[6,9],"tags":[],"class_list":["post-4120","post","type-post","status-publish","format-standard","hentry","category-lasers-a-solides","category-lasers-semiconducteurs"],"_links":{"self":[{"href":"https:\/\/www.swissrocketman.fr\/Wordpress\/wp-json\/wp\/v2\/posts\/4120","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.swissrocketman.fr\/Wordpress\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.swissrocketman.fr\/Wordpress\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.swissrocketman.fr\/Wordpress\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.swissrocketman.fr\/Wordpress\/wp-json\/wp\/v2\/comments?post=4120"}],"version-history":[{"count":16,"href":"https:\/\/www.swissrocketman.fr\/Wordpress\/wp-json\/wp\/v2\/posts\/4120\/revisions"}],"predecessor-version":[{"id":4772,"href":"https:\/\/www.swissrocketman.fr\/Wordpress\/wp-json\/wp\/v2\/posts\/4120\/revisions\/4772"}],"wp:attachment":[{"href":"https:\/\/www.swissrocketman.fr\/Wordpress\/wp-json\/wp\/v2\/media?parent=4120"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.swissrocketman.fr\/Wordpress\/wp-json\/wp\/v2\/categories?post=4120"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.swissrocketman.fr\/Wordpress\/wp-json\/wp\/v2\/tags?post=4120"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}