{"id":1215,"date":"2022-12-25T18:38:19","date_gmt":"2022-12-25T17:38:19","guid":{"rendered":"http:\/\/s848664668.onlinehome.fr\/Wordpress\/?p=1215"},"modified":"2025-12-21T16:58:27","modified_gmt":"2025-12-21T15:58:27","slug":"picoseconde-et-femtoseconde-doubleur-de-frequence","status":"publish","type":"post","link":"https:\/\/www.swissrocketman.fr\/Wordpress\/?p=1215","title":{"rendered":"Doubleur de fr\u00e9quence pour laser femtoseconde titane saphir \u00e0 800 nm"},"content":{"rendered":"

Doubleur de fr\u00e9quence pour laser femtoseconde titane saphir \u00e0 800 nm<\/h2>
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Doubleur de fr\u00e9quence pour laser femtoseconde titane saphir \u00e0 800 nm muni d’un cristal doubleur en LBO de 5x5x1 mm mont\u00e9 sur un rail lin\u00e9aire actionn\u00e9 par un micro moteur piezo \u00e9lectrique. Ce doubleur permet de r\u00e9aliser des pulses lasers de 90 femtoseconde entre 345 et 520 nm.<\/h4>\n<\/div><\/section><\/div>\n
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1) Qu\u2019est-ce que c\u2019est:<\/span><\/h3>\n

Un doubleur de fr\u00e9quence (SHG, second-harmonic generator)<\/strong> transforme la sortie fondamentale d\u2019un Ti:Sapphire centr\u00e9e ~800 nm en sa seconde harmonique (~400 nm) via un cristal non lin\u00e9aire (typiquement BBO) mont\u00e9 dans un bo\u00eetier d\u2019accessoire : orientation de phase-matching, compenseurs de walk-off, et options THG\/FHG\/auto-tracking selon les versions. Coherent Inc<\/span>+1<\/span><\/span><\/span><\/a><\/span><\/span><\/p>\n

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2) Ce que fait Coherent (produit type : Harmonic Generator<\/em> \/ accessoire Mira\/Mira-HP)<\/span><\/h3>\n

Points-cl\u00e9s extraits du datasheet Coherent Harmonic Generator (accessoire pour Mira 900 \/ Mira-HP) :<\/p>\n