{"id":2244,"date":"2023-06-18T15:48:16","date_gmt":"2023-06-18T13:48:16","guid":{"rendered":"http:\/\/s848664668.onlinehome.fr\/Wordpress\/?p=2244"},"modified":"2023-07-03T12:03:04","modified_gmt":"2023-07-03T10:03:04","slug":"mesure-de-la-duree-dun-pulse-laser-avec-un-autocorrelateur-femtochrome","status":"publish","type":"post","link":"https:\/\/www.swissrocketman.fr\/Wordpress\/?p=2244","title":{"rendered":"Mesure de la dur\u00e9e d&rsquo;un pulse laser avec un autocorrelateur FEMTOCHROME"},"content":{"rendered":"<div class=\"flex_column av_one_full  flex_column_div av-zero-column-padding first  avia-builder-el-0  el_before_av_one_full  avia-builder-el-first  \" style='border-radius:0px; '><div  class='avia-video avia-video-16-9   av-lazyload-immediate  av-lazyload-video-embed  '   itemprop=\"video\" itemtype=\"https:\/\/schema.org\/VideoObject\"  data-original_url='https:\/\/youtu.be\/l7kgaaajRIw' ><script type='text\/html' class='av-video-tmpl'><div class='avia-iframe-wrap'><iframe loading=\"lazy\" title=\"Mesure de la dur\u00e9e d&#039;un pulse laser au moyen d&#039;un autocorrelateur\" width=\"1500\" height=\"844\" src=\"https:\/\/www.youtube.com\/embed\/l7kgaaajRIw?feature=oembed&autoplay=0&loop=0&controls=1&mute=0\" frameborder=\"0\" allow=\"accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share\" allowfullscreen><\/iframe><\/div><\/script><div class='av-click-to-play-overlay'><div class=\"avia_playpause_icon\"><\/div><\/div><\/div><\/div>\n<div class=\"flex_column av_one_full  flex_column_div av-zero-column-padding first  avia-builder-el-2  el_after_av_one_full  el_before_av_one_full  column-top-margin\" style='border-radius:0px; '><div  class='avia-image-container  av-styling-    avia-builder-el-3  avia-builder-el-no-sibling  avia-align-center '  itemprop=\"image\" itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/ImageObject\"  ><div class='avia-image-container-inner'><div class='avia-image-overlay-wrap'><img decoding=\"async\" class='wp-image-2268 avia-img-lazy-loading-not-2268 avia_image' src=\"https:\/\/www.swissrocketman.fr\/Wordpress\/wp-content\/uploads\/2023\/06\/20230618_143553-1-scaled.jpg\" alt='' title='20230618_143553' height=\"1440\" width=\"2560\"  itemprop=\"thumbnailUrl\" srcset=\"https:\/\/www.swissrocketman.fr\/Wordpress\/wp-content\/uploads\/2023\/06\/20230618_143553-1-scaled.jpg 2560w, https:\/\/www.swissrocketman.fr\/Wordpress\/wp-content\/uploads\/2023\/06\/20230618_143553-1-300x169.jpg 300w, https:\/\/www.swissrocketman.fr\/Wordpress\/wp-content\/uploads\/2023\/06\/20230618_143553-1-1030x579.jpg 1030w, https:\/\/www.swissrocketman.fr\/Wordpress\/wp-content\/uploads\/2023\/06\/20230618_143553-1-768x432.jpg 768w, https:\/\/www.swissrocketman.fr\/Wordpress\/wp-content\/uploads\/2023\/06\/20230618_143553-1-1536x864.jpg 1536w, https:\/\/www.swissrocketman.fr\/Wordpress\/wp-content\/uploads\/2023\/06\/20230618_143553-1-2048x1152.jpg 2048w, https:\/\/www.swissrocketman.fr\/Wordpress\/wp-content\/uploads\/2023\/06\/20230618_143553-1-1500x844.jpg 1500w, https:\/\/www.swissrocketman.fr\/Wordpress\/wp-content\/uploads\/2023\/06\/20230618_143553-1-705x397.jpg 705w\" sizes=\"(max-width: 2560px) 100vw, 2560px\" \/><\/div><\/div><\/div><\/div>\n<div class=\"flex_column av_one_full  flex_column_div av-zero-column-padding first  avia-builder-el-4  el_after_av_one_full  el_before_av_one_full  column-top-margin\" style='border-radius:0px; '><section class=\"av_textblock_section \"  itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/BlogPosting\" itemprop=\"blogPost\" ><div class='avia_textblock  '   itemprop=\"text\" ><h4>L&rsquo;auto-corr\u00e9lateur se compose d&rsquo;une lame s\u00e9paratrice de 0.25 micron d&rsquo;\u00e9paisseur sur laquelle le faisceau \u00e0 analyser est divis\u00e9 en 2 parts.<br \/>\nUne part est dirig\u00e9e dans un bras fixe et l&rsquo;autre part est dirig\u00e9e dans un bras muni de 2 miroirs tournant autour d&rsquo;un axe \u00e0 10 tours par seconde et renvoy\u00e9 par le miroir M3 sur le miroir M2.<br \/>\nCe bras varie de longueur 20 fois par seconde.<br \/>\nLe faisceau issue du bras fixe est renvoy\u00e9 sur le miroir M2. Le miroir M2 concave focalise les 2 faisceaux sur un cristal doubleur de fr\u00e9quence.<br \/>\nLe faisceau doubl\u00e9 en fr\u00e9quence entre par un orifice de 0.5mm sur un photomultiplicateur. Le gain est r\u00e9gl\u00e9 par la tension d&rsquo;alimentation entre 100 volts et 1000 volts.<br \/>\nAvec une fr\u00e9quence de rotation de 10Hz l&rsquo;affichage sur l&rsquo;oscilloscope est de 12.5 <i><b>ps\/ms @ 10Hz\u00a0 \u00a0et\u00a0 6.25 ps\/ms @ 5Hz<br \/>\n<\/b><\/i>Pour un pulse de forme Gaussien le coefficient est de 0.707.<\/h4>\n<h4><span style=\"color: #800080;\">Le beam splitter \u00e0 l&rsquo;entr\u00e9e de l&rsquo;autocorr\u00e9lateur se compose d&rsquo;une feuille d&rsquo;or de 0.25 micron d&rsquo;\u00e9paisseur ce qui permet d&rsquo;avoir un chirp inf\u00e9rieur \u00e0 1 femtoseconde. Toutes les surfaces des prisms et miroirs sont des couches m\u00e9tallique permettant de maintenir le chirp en dessous de 1 femtoseconde. Le doubleur BBO \u00e0 une \u00e9paisseur de 0.05 mm !<\/span><\/h4>\n<\/div><\/section><\/div><div class=\"flex_column av_one_full  flex_column_div av-zero-column-padding first  avia-builder-el-6  el_after_av_one_full  el_before_av_one_full  column-top-margin\" style='border-radius:0px; '><div  class='avia-image-container  av-styling-    avia-builder-el-7  avia-builder-el-no-sibling  avia-align-center '  itemprop=\"image\" itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/ImageObject\"  ><div class='avia-image-container-inner'><div class='avia-image-overlay-wrap'><img decoding=\"async\" class='wp-image-2249 avia-img-lazy-loading-not-2249 avia_image' src=\"https:\/\/www.swissrocketman.fr\/Wordpress\/wp-content\/uploads\/2023\/06\/Capture-decran-2023-06-18-131707.jpg\" alt='' title='Capture d\u2019\u00e9cran 2023-06-18 131707' height=\"789\" width=\"593\"  itemprop=\"thumbnailUrl\" srcset=\"https:\/\/www.swissrocketman.fr\/Wordpress\/wp-content\/uploads\/2023\/06\/Capture-decran-2023-06-18-131707.jpg 593w, https:\/\/www.swissrocketman.fr\/Wordpress\/wp-content\/uploads\/2023\/06\/Capture-decran-2023-06-18-131707-225x300.jpg 225w, https:\/\/www.swissrocketman.fr\/Wordpress\/wp-content\/uploads\/2023\/06\/Capture-decran-2023-06-18-131707-530x705.jpg 530w\" sizes=\"(max-width: 593px) 100vw, 593px\" \/><\/div><\/div><\/div><\/div><\/p>\n<div class=\"flex_column av_one_full  flex_column_div av-zero-column-padding first  avia-builder-el-8  el_after_av_one_full  el_before_av_one_full  column-top-margin\" style='border-radius:0px; '><div  class='avia-image-container  av-styling-    avia-builder-el-9  avia-builder-el-no-sibling  avia-align-center '  itemprop=\"image\" itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/ImageObject\"  ><div class='avia-image-container-inner'><div class='avia-image-overlay-wrap'><img decoding=\"async\" class='wp-image-2253 avia-img-lazy-loading-not-2253 avia_image' src=\"https:\/\/www.swissrocketman.fr\/Wordpress\/wp-content\/uploads\/2023\/06\/Capture-decran-2023-06-18-155525.jpg\" alt='' title='Capture d\u2019\u00e9cran 2023-06-18 155525' height=\"304\" width=\"495\"  itemprop=\"thumbnailUrl\" srcset=\"https:\/\/www.swissrocketman.fr\/Wordpress\/wp-content\/uploads\/2023\/06\/Capture-decran-2023-06-18-155525.jpg 495w, https:\/\/www.swissrocketman.fr\/Wordpress\/wp-content\/uploads\/2023\/06\/Capture-decran-2023-06-18-155525-300x184.jpg 300w\" sizes=\"(max-width: 495px) 100vw, 495px\" \/><\/div><\/div><\/div><\/div>\n<div class=\"flex_column av_one_full  flex_column_div av-zero-column-padding first  avia-builder-el-10  el_after_av_one_full  el_before_av_one_half  column-top-margin\" style='border-radius:0px; '><div  class='avia-image-container  av-styling-    avia-builder-el-11  avia-builder-el-no-sibling  avia-align-center '  itemprop=\"image\" itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/ImageObject\"  ><div class='avia-image-container-inner'><div class='avia-image-overlay-wrap'><img decoding=\"async\" class='wp-image-2257 avia-img-lazy-loading-not-2257 avia_image' src=\"https:\/\/www.swissrocketman.fr\/Wordpress\/wp-content\/uploads\/2023\/06\/Capture-decran-2023-06-18-160522.jpg\" alt='' title='Capture d\u2019\u00e9cran 2023-06-18 160522' height=\"591\" width=\"1084\"  itemprop=\"thumbnailUrl\" srcset=\"https:\/\/www.swissrocketman.fr\/Wordpress\/wp-content\/uploads\/2023\/06\/Capture-decran-2023-06-18-160522.jpg 1084w, https:\/\/www.swissrocketman.fr\/Wordpress\/wp-content\/uploads\/2023\/06\/Capture-decran-2023-06-18-160522-300x164.jpg 300w, https:\/\/www.swissrocketman.fr\/Wordpress\/wp-content\/uploads\/2023\/06\/Capture-decran-2023-06-18-160522-1030x562.jpg 1030w, https:\/\/www.swissrocketman.fr\/Wordpress\/wp-content\/uploads\/2023\/06\/Capture-decran-2023-06-18-160522-768x419.jpg 768w, https:\/\/www.swissrocketman.fr\/Wordpress\/wp-content\/uploads\/2023\/06\/Capture-decran-2023-06-18-160522-705x384.jpg 705w\" sizes=\"(max-width: 1084px) 100vw, 1084px\" \/><\/div><\/div><\/div><\/div>\n<div class=\"flex_column av_one_half  flex_column_div av-zero-column-padding first  avia-builder-el-12  el_after_av_one_full  el_before_av_one_half  column-top-margin\" style='border-radius:0px; '><div  class='avia-image-container  av-styling-    avia-builder-el-13  avia-builder-el-no-sibling  avia-align-center '  itemprop=\"image\" itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/ImageObject\"  ><div class='avia-image-container-inner'><div class='avia-image-overlay-wrap'><img decoding=\"async\" class='wp-image-2260 avia-img-lazy-loading-not-2260 avia_image' src=\"https:\/\/www.swissrocketman.fr\/Wordpress\/wp-content\/uploads\/2023\/06\/Capture-decran-2023-06-18-175614.jpg\" alt='' title='Capture d\u2019\u00e9cran 2023-06-18 175614' height=\"390\" width=\"711\"  itemprop=\"thumbnailUrl\" srcset=\"https:\/\/www.swissrocketman.fr\/Wordpress\/wp-content\/uploads\/2023\/06\/Capture-decran-2023-06-18-175614.jpg 711w, https:\/\/www.swissrocketman.fr\/Wordpress\/wp-content\/uploads\/2023\/06\/Capture-decran-2023-06-18-175614-300x165.jpg 300w, https:\/\/www.swissrocketman.fr\/Wordpress\/wp-content\/uploads\/2023\/06\/Capture-decran-2023-06-18-175614-705x387.jpg 705w\" sizes=\"(max-width: 711px) 100vw, 711px\" \/><\/div><\/div><\/div><\/div>\n<div class=\"flex_column av_one_half  flex_column_div av-zero-column-padding   avia-builder-el-14  el_after_av_one_half  el_before_av_one_full  column-top-margin\" style='border-radius:0px; '><div  class='avia-image-container  av-styling-    avia-builder-el-15  avia-builder-el-no-sibling  avia-align-center '  itemprop=\"image\" itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/ImageObject\"  ><div class='avia-image-container-inner'><div class='avia-image-overlay-wrap'><img decoding=\"async\" class='wp-image-2266 avia-img-lazy-loading-not-2266 avia_image' src=\"https:\/\/www.swissrocketman.fr\/Wordpress\/wp-content\/uploads\/2023\/06\/Capture-decran-2023-06-19-011746.jpg\" alt='' title='Capture d\u2019\u00e9cran 2023-06-19 011746' height=\"428\" width=\"712\"  itemprop=\"thumbnailUrl\" srcset=\"https:\/\/www.swissrocketman.fr\/Wordpress\/wp-content\/uploads\/2023\/06\/Capture-decran-2023-06-19-011746.jpg 712w, https:\/\/www.swissrocketman.fr\/Wordpress\/wp-content\/uploads\/2023\/06\/Capture-decran-2023-06-19-011746-300x180.jpg 300w, https:\/\/www.swissrocketman.fr\/Wordpress\/wp-content\/uploads\/2023\/06\/Capture-decran-2023-06-19-011746-705x424.jpg 705w\" sizes=\"(max-width: 712px) 100vw, 712px\" \/><\/div><\/div><\/div><\/div>\n<div class=\"flex_column av_one_full  flex_column_div av-zero-column-padding first  avia-builder-el-16  el_after_av_one_half  el_before_av_one_half  column-top-margin\" style='border-radius:0px; '><div  class='avia-image-container  av-styling-    avia-builder-el-17  avia-builder-el-no-sibling  avia-align-center '  itemprop=\"image\" itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/ImageObject\"  ><div class='avia-image-container-inner'><div class='avia-image-overlay-wrap'><img decoding=\"async\" class='wp-image-2272 avia-img-lazy-loading-not-2272 avia_image' src=\"https:\/\/www.swissrocketman.fr\/Wordpress\/wp-content\/uploads\/2023\/06\/20230619_120107-1-scaled.jpg\" alt='' title='20230619_120107 (1)' height=\"1440\" width=\"2560\"  itemprop=\"thumbnailUrl\" srcset=\"https:\/\/www.swissrocketman.fr\/Wordpress\/wp-content\/uploads\/2023\/06\/20230619_120107-1-scaled.jpg 2560w, https:\/\/www.swissrocketman.fr\/Wordpress\/wp-content\/uploads\/2023\/06\/20230619_120107-1-300x169.jpg 300w, https:\/\/www.swissrocketman.fr\/Wordpress\/wp-content\/uploads\/2023\/06\/20230619_120107-1-1030x579.jpg 1030w, https:\/\/www.swissrocketman.fr\/Wordpress\/wp-content\/uploads\/2023\/06\/20230619_120107-1-768x432.jpg 768w, https:\/\/www.swissrocketman.fr\/Wordpress\/wp-content\/uploads\/2023\/06\/20230619_120107-1-1536x864.jpg 1536w, https:\/\/www.swissrocketman.fr\/Wordpress\/wp-content\/uploads\/2023\/06\/20230619_120107-1-2048x1152.jpg 2048w, https:\/\/www.swissrocketman.fr\/Wordpress\/wp-content\/uploads\/2023\/06\/20230619_120107-1-1500x844.jpg 1500w, https:\/\/www.swissrocketman.fr\/Wordpress\/wp-content\/uploads\/2023\/06\/20230619_120107-1-705x397.jpg 705w\" sizes=\"(max-width: 2560px) 100vw, 2560px\" \/><\/div><\/div><\/div><\/div>\n<div class=\"flex_column av_one_half  flex_column_div av-zero-column-padding first  avia-builder-el-18  el_after_av_one_full  el_before_av_one_half  column-top-margin\" style='border-radius:0px; '><div  class='avia-image-container  av-styling-    avia-builder-el-19  avia-builder-el-no-sibling  avia-align-center '  itemprop=\"image\" itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/ImageObject\"  ><div class='avia-image-container-inner'><div class='avia-image-overlay-wrap'><img decoding=\"async\" class='wp-image-2275 avia-img-lazy-loading-not-2275 avia_image' src=\"https:\/\/www.swissrocketman.fr\/Wordpress\/wp-content\/uploads\/2023\/06\/Capture-decran-2023-06-19-202226.jpg\" alt='' title='Capture d\u2019\u00e9cran 2023-06-19 202226' height=\"774\" width=\"671\"  itemprop=\"thumbnailUrl\" srcset=\"https:\/\/www.swissrocketman.fr\/Wordpress\/wp-content\/uploads\/2023\/06\/Capture-decran-2023-06-19-202226.jpg 671w, https:\/\/www.swissrocketman.fr\/Wordpress\/wp-content\/uploads\/2023\/06\/Capture-decran-2023-06-19-202226-260x300.jpg 260w, https:\/\/www.swissrocketman.fr\/Wordpress\/wp-content\/uploads\/2023\/06\/Capture-decran-2023-06-19-202226-611x705.jpg 611w\" sizes=\"(max-width: 671px) 100vw, 671px\" \/><\/div><\/div><\/div><\/div>\n<div class=\"flex_column av_one_half  flex_column_div av-zero-column-padding   avia-builder-el-20  el_after_av_one_half  avia-builder-el-last  column-top-margin\" style='border-radius:0px; '><div  class='avia-image-container  av-styling-    avia-builder-el-21  avia-builder-el-no-sibling  avia-align-center '  itemprop=\"image\" itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/ImageObject\"  ><div class='avia-image-container-inner'><div class='avia-image-overlay-wrap'><img decoding=\"async\" class='wp-image-2276 avia-img-lazy-loading-not-2276 avia_image' src=\"https:\/\/www.swissrocketman.fr\/Wordpress\/wp-content\/uploads\/2023\/06\/Capture-decran-2023-06-19-202301.jpg\" alt='' title='Capture d\u2019\u00e9cran 2023-06-19 202301' height=\"820\" width=\"755\"  itemprop=\"thumbnailUrl\" srcset=\"https:\/\/www.swissrocketman.fr\/Wordpress\/wp-content\/uploads\/2023\/06\/Capture-decran-2023-06-19-202301.jpg 755w, https:\/\/www.swissrocketman.fr\/Wordpress\/wp-content\/uploads\/2023\/06\/Capture-decran-2023-06-19-202301-276x300.jpg 276w, https:\/\/www.swissrocketman.fr\/Wordpress\/wp-content\/uploads\/2023\/06\/Capture-decran-2023-06-19-202301-649x705.jpg 649w\" sizes=\"(max-width: 755px) 100vw, 755px\" \/><\/div><\/div><\/div><\/div>\n","protected":false},"excerpt":{"rendered":"","protected":false},"author":1,"featured_media":2247,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[11,10,1],"tags":[],"class_list":["post-2244","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-experiences-lasers","category-experiences-thierry-et-arnold","category-non-classe"],"_links":{"self":[{"href":"https:\/\/www.swissrocketman.fr\/Wordpress\/index.php?rest_route=\/wp\/v2\/posts\/2244","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.swissrocketman.fr\/Wordpress\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.swissrocketman.fr\/Wordpress\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.swissrocketman.fr\/Wordpress\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.swissrocketman.fr\/Wordpress\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=2244"}],"version-history":[{"count":14,"href":"https:\/\/www.swissrocketman.fr\/Wordpress\/index.php?rest_route=\/wp\/v2\/posts\/2244\/revisions"}],"predecessor-version":[{"id":2350,"href":"https:\/\/www.swissrocketman.fr\/Wordpress\/index.php?rest_route=\/wp\/v2\/posts\/2244\/revisions\/2350"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.swissrocketman.fr\/Wordpress\/index.php?rest_route=\/wp\/v2\/media\/2247"}],"wp:attachment":[{"href":"https:\/\/www.swissrocketman.fr\/Wordpress\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=2244"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.swissrocketman.fr\/Wordpress\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=2244"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.swissrocketman.fr\/Wordpress\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=2244"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}