{"id":13329,"date":"2023-08-07T02:43:37","date_gmt":"2023-08-07T02:43:37","guid":{"rendered":"https:\/\/staging.rayzeek.com\/?p=13329"},"modified":"2023-12-26T08:38:00","modified_gmt":"2023-12-26T08:38:00","slug":"what-is-coherent-light","status":"publish","type":"post","link":"https:\/\/staging.rayzeek.com\/fr\/glossary\/what-is-coherent-light\/","title":{"rendered":"Qu'est-ce que la lumi\u00e8re coh\u00e9rente ?"},"content":{"rendered":"<h2 class=\"wp-block-heading\" id=\"h-what-is-coherent-light\">Qu'est-ce que la lumi\u00e8re coh\u00e9rente ?<\/h2>\n\n\n<p class=\"wp-block-paragraph\">La lumi\u00e8re coh\u00e9rente est un rayonnement \u00e9lectromagn\u00e9tique pr\u00e9sentant une synchronisation \u00e0 la fois dans les domaines spatial et temporel. Cette synchronisation se caract\u00e9rise par des ondes se propageant dans la m\u00eame direction, oscillant au m\u00eame niveau et ayant la m\u00eame phase. En cons\u00e9quence, la lumi\u00e8re coh\u00e9rente est constitu\u00e9e d'une lumi\u00e8re monochromatique ayant une longueur d'onde sp\u00e9cifique. La caract\u00e9ristique cl\u00e9 de la lumi\u00e8re coh\u00e9rente est sa capacit\u00e9 \u00e0 maintenir une relation fixe entre des param\u00e8tres descriptifs tels que la fr\u00e9quence, la polarisation et la phase au sein d'un contexte spatial et temporel d\u00e9termin\u00e9. Cette synchronisation permet aux ondes de se renforcer mutuellement, ce qui produit un faisceau lumineux plus concentr\u00e9 et plus puissant.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">La lumi\u00e8re coh\u00e9rente est couramment associ\u00e9e \u00e0 la technologie laser, o\u00f9 elle est g\u00e9n\u00e9r\u00e9e par le processus d'\u00e9mission stimul\u00e9e en utilisant un milieu de gain \u00e0 semi-conducteur. Elle est \u00e9galement utilis\u00e9e dans diverses applications n\u00e9cessitant un synchronisme, une pr\u00e9cision temporelle et un contr\u00f4le rigoureux de la propagation de la lumi\u00e8re, telles que les syst\u00e8mes de communication optique, l'holographie, l'interf\u00e9rom\u00e9trie et la photonique int\u00e9gr\u00e9e.<\/p>\n<div class=\"insert_inquiry_outer_wrapper\"><h3>Vous recherchez des solutions d\u2019\u00e9conomie d\u2019\u00e9nergie activ\u00e9es par le mouvement ?<\/h3><p>Contactez-nous pour obtenir une gamme compl\u00e8te de d\u00e9tecteurs de mouvement PIR, de produits d\u2019\u00e9conomie d\u2019\u00e9nergie activ\u00e9s par le mouvement, d\u2019interrupteurs \u00e0 d\u00e9tecteur de mouvement et de solutions commerciales de pr\u00e9sence\/vacance.<\/p><div class = \"insert_inquiry_buttons\"><div class = \"insert_inquiry_button_wrapper insert_inquiry_button_email\"><div><a href = \"mailto:info@rayzeek.com\"><p>Envoyer un e-mail<\/p><\/a><\/div><\/div><div class = \"insert_inquiry_button_wrapper insert_inquiry_button_email_contact\"><div><a href=\"https:\/\/www.rayzeek.com\/contact\"><p>Formulaire de contact<\/p><\/a><\/div><\/div><div class = \"insert_inquiry_button_wrapper insert_inquiry_button_chat chat_jump\"><div><a href=\"#\"><p>Discuter en ligne<\/p><\/a><\/div><\/div><\/div><\/div>\n\n\n\n<div class=\"wp-block-group glossary_faqs\"><div class=\"wp-block-group__inner-container is-layout-constrained wp-block-group-is-layout-constrained\"><h2 class=\"wp-block-heading\" id=\"h-frequently-asked-questions\">Foire aux questions<\/h2>\n\n\n<div class=\"wp-block-group glossary_faq\"><div class=\"wp-block-group__inner-container is-layout-constrained wp-block-group-is-layout-constrained\">\n<div class=\"wp-block-group glossary_faq_q\"><div class=\"wp-block-group__inner-container is-layout-constrained wp-block-group-is-layout-constrained\"><h3 class=\"wp-block-heading\" id=\"h-what-is-the-difference-between-coherent-and-incoherent-light\">Quelle est la diff\u00e9rence entre la lumi\u00e8re coh\u00e9rente et la lumi\u00e8re incoh\u00e9rente ?<\/h3><\/div><\/div>\n\n\n\n<div class=\"wp-block-group glossary_faq_a\"><div class=\"wp-block-group__inner-container is-layout-constrained wp-block-group-is-layout-constrained\">\n<p class=\"wp-block-paragraph\">La lumi\u00e8re coh\u00e9rente se caract\u00e9rise par une fr\u00e9quence et une longueur d'onde uniques. En revanche, la lumi\u00e8re incoh\u00e9rente pr\u00e9sente plusieurs fr\u00e9quences lumineuses et sa fr\u00e9quence peut varier de mani\u00e8re al\u00e9atoire.<\/p>\n<\/div><\/div>\n<\/div><\/div>\n\n\n\n<div class=\"wp-block-group glossary_faq\"><div class=\"wp-block-group__inner-container is-layout-constrained wp-block-group-is-layout-constrained\">\n<div class=\"wp-block-group glossary_faq_q\"><div class=\"wp-block-group__inner-container is-layout-constrained wp-block-group-is-layout-constrained\"><h3 class=\"wp-block-heading\" id=\"h-are-led-lights-coherent\">Les lumi\u00e8res LED sont-elles coh\u00e9rentes ?<\/h3><\/div><\/div>\n\n\n\n<div class=\"wp-block-group glossary_faq_a\"><div class=\"wp-block-group__inner-container is-layout-constrained wp-block-group-is-layout-constrained\">\n<p class=\"wp-block-paragraph\">Contrairement \u00e0 un laser, les LED n'\u00e9mettent pas une lumi\u00e8re spectralement coh\u00e9rente ni hautement monochromatique. Cependant, leur spectre est suffisamment \u00e9troit pour \u00eatre per\u00e7u par l'\u0153il humain comme une couleur pure (satur\u00e9e).<\/p>\n<\/div><\/div>\n<\/div><\/div>\n\n\n\n<div class=\"wp-block-group glossary_faq\"><div class=\"wp-block-group__inner-container is-layout-constrained wp-block-group-is-layout-constrained\">\n<div class=\"wp-block-group glossary_faq_q\"><div class=\"wp-block-group__inner-container is-layout-constrained wp-block-group-is-layout-constrained\"><h3 class=\"wp-block-heading\" id=\"h-what-is-the-benefit-of-coherent-light\">Quel est l'avantage de la lumi\u00e8re coh\u00e9rente ?<\/h3><\/div><\/div>\n\n\n\n<div class=\"wp-block-group glossary_faq_a\"><div class=\"wp-block-group__inner-container is-layout-constrained wp-block-group-is-layout-constrained\">\n<p class=\"wp-block-paragraph\">L'avantage de la lumi\u00e8re coh\u00e9rente est qu'elle permet la mise en \u0153uvre du multiplexage, qui combine plusieurs signaux en un seul. Cette fonctionnalit\u00e9 facilite l'obtention d'un d\u00e9bit de donn\u00e9es plus \u00e9lev\u00e9 et d'une transmission sur de plus longues distances. De plus, l'optique coh\u00e9rente offre la flexibilit\u00e9 d'ajuster le nombre de canaux pouvant \u00eatre multiplex\u00e9s.<\/p>\n<\/div><\/div>\n<\/div><\/div>\n\n\n\n<div class=\"wp-block-group glossary_faq\"><div class=\"wp-block-group__inner-container is-layout-constrained wp-block-group-is-layout-constrained\">\n<div class=\"wp-block-group glossary_faq_q\"><div class=\"wp-block-group__inner-container is-layout-constrained wp-block-group-is-layout-constrained\"><h3 class=\"wp-block-heading\" id=\"h-how-do-you-make-light-coherent\">Comment rendre la lumi\u00e8re coh\u00e9rente ?<\/h3><\/div><\/div>\n\n\n\n<div class=\"wp-block-group glossary_faq_a\"><div class=\"wp-block-group__inner-container is-layout-constrained wp-block-group-is-layout-constrained\">\n<p class=\"wp-block-paragraph\">Il est possible de g\u00e9n\u00e9rer une lumi\u00e8re coh\u00e9rente \u00e0 partir d'une source incoh\u00e9rente en \u00e9liminant une partie importante de la lumi\u00e8re. Cela s'effectue en filtrant d'abord la lumi\u00e8re de la source incoh\u00e9rente afin d'en am\u00e9liorer la coh\u00e9rence spatiale, puis en la filtrant spectralement pour en am\u00e9liorer la coh\u00e9rence temporelle.<\/p>\n<\/div><\/div>\n<\/div><\/div>\n\n\n\n<div class=\"wp-block-group glossary_faq\"><div class=\"wp-block-group__inner-container is-layout-constrained wp-block-group-is-layout-constrained\">\n<div class=\"wp-block-group glossary_faq_q\"><div class=\"wp-block-group__inner-container is-layout-constrained wp-block-group-is-layout-constrained\"><h3 class=\"wp-block-heading\" id=\"h-what-light-cannot-be-coherent\">Quelle lumi\u00e8re ne peut pas \u00eatre coh\u00e9rente ?<\/h3><\/div><\/div>\n\n\n\n<div class=\"wp-block-group glossary_faq_a\"><div class=\"wp-block-group__inner-container is-layout-constrained wp-block-group-is-layout-constrained\">\n<p class=\"wp-block-paragraph\">Deux sources de lumi\u00e8re ind\u00e9pendantes l'une de l'autre ne peuvent pas \u00eatre coh\u00e9rentes. Cela s'explique par le fait que la lumi\u00e8re est \u00e9mise par des atomes individuels lorsqu'ils retournent \u00e0 leur \u00e9tat fondamental. M\u00eame la plus petite source de lumi\u00e8re est compos\u00e9e de milliards d'atomes, ce qui rend impossible l'\u00e9mission d'ondes lumineuses dans la m\u00eame phase.<\/p>\n<\/div><\/div>\n<\/div><\/div>\n\n\n\n<div class=\"wp-block-group glossary_faq\"><div class=\"wp-block-group__inner-container is-layout-constrained wp-block-group-is-layout-constrained\">\n<div class=\"wp-block-group glossary_faq_q\"><div class=\"wp-block-group__inner-container is-layout-constrained wp-block-group-is-layout-constrained\"><h3 class=\"wp-block-heading\" id=\"h-is-white-light-coherent-or-incoherent\">La lumi\u00e8re blanche est-elle coh\u00e9rente ou incoh\u00e9rente ?<\/h3><\/div><\/div>\n\n\n\n<div class=\"wp-block-group glossary_faq_a\"><div class=\"wp-block-group__inner-container is-layout-constrained wp-block-group-is-layout-constrained\">\n<p class=\"wp-block-paragraph\">Enfin, la lumi\u00e8re blanche, avec sa large gamme de fr\u00e9quences, est une onde qui fluctue rapidement en amplitude et en phase. En raison de son court temps de coh\u00e9rence, d'environ 10 p\u00e9riodes seulement, elle est g\u00e9n\u00e9ralement consid\u00e9r\u00e9e comme incoh\u00e9rente.<\/p>\n<\/div><\/div>\n<\/div><\/div>\n<\/div><\/div>","protected":false},"excerpt":{"rendered":"<p>Contactez-nous pour obtenir des d\u00e9tecteurs de mouvement PIR complets, des produits d'\u00e9conomie d'\u00e9nergie activ\u00e9s par le mouvement, des interrupteurs d\u00e9tecteurs de mouvement et des solutions commerciales de pr\u00e9sence\/absence.Envoyer un e-mailFormulaire de contactDiscussion en ligne<\/p>\n<p>&lt;div class=&quot;wp-block-group__inner-container is-layout-constrained wp-block-group-is-layout-const<\/p>","protected":false},"author":4,"featured_media":12864,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"article_term":"","article_term_alternate":"","article_term_def":"","article_hook":"","auto_links":"[{\"keyword\": \"laser technology\", \"idxall\": 0, \"keywordtitlesimi\": 0.7875840663909912, \"keywordslugsimi\": 0.7875840663909912, \"paratitlesimi\": 0.7111015319824219, \"paraslugsimi\": 0.7111015319824219, \"slug\": \"what-is-laser-light\", \"title\": \"What is Laser Light\", \"id\": 13976}, {\"keyword\": \"medium\", \"idxall\": 0, \"keywordtitlesimi\": 0.764789879322052, \"keywordslugsimi\": 0.764789879322052, \"paratitlesimi\": 0.5488243699073792, \"paraslugsimi\": 0.5488243699073792, \"slug\": \"what-is-medium-light\", \"title\": \"What is Medium Light\", \"id\": 13818}]","article_topic":"","article_fact_check":"","mt_social_share":"","mt_content_meta":"","mt_glossary_display":"","glossary_heading":"","glossary":"Coherent Light","glossary_alter":"","glossary_def":"","article_task":"","footnotes":""},"categories":[102],"tags":[99],"class_list":["post-13329","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-glossary","tag-glossary"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v24.9 - 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