{"id":400320,"date":"2022-10-26T19:35:51","date_gmt":"2022-10-26T17:35:51","guid":{"rendered":"https:\/\/www.ecinews.fr\/?p=400320"},"modified":"2022-10-26T19:35:51","modified_gmt":"2022-10-26T17:35:51","slug":"detecter-des-signaux-faibles-a-des-frequences-ghz","status":"publish","type":"post","link":"https:\/\/www.ecinews.fr\/fr\/detecter-des-signaux-faibles-a-des-frequences-ghz\/","title":{"rendered":"D\u00e9tecter des signaux faibles \u00e0 des fr\u00e9quences GHz"},"content":{"rendered":"

Les d\u00e9tections synchrones ou lock-in amplifier sont un \u00e9l\u00e9ment essentiel des laboratoires de recherche dans des domaines tels que l’optique et la photonique, la nanotechnologie et la science des mat\u00e9riaux, la microscopie \u00e0 sonde locale et les capteurs. Du moment qu’une d\u00e9tection synchrone peut extraire de tr\u00e8s faibles signaux enfouis dans le bruit, il est possible de d\u00e9couvrir de nouveaux ph\u00e9nom\u00e8nes et d’\u00e9tendre la port\u00e9e des manipulations exp\u00e9rimentales. Le principe de fonctionnement d’une d\u00e9tection synchrone, appel\u00e9 d\u00e9modulation ou d\u00e9tection sensible \u00e0 la phase, repose sur le m\u00e9lange du signal mesur\u00e9 avec une fr\u00e9quence de r\u00e9f\u00e9rence suivi d’un filtrage passe-bas. Zurich Instruments partenaire d\u2019Opton Laser propose une large gamme de d\u00e9tection synchrones avec des gammes fr\u00e9quentielles diff\u00e9rentes\u00a0: le MFLI DC-500 kHz\/5MHz, le HF2LI DC-50MHz et le UHFLI DC-600 MHz. Les deux nouveaux produits de d\u00e9tections synchrones aux fr\u00e9quences GHz sont le GHFLI DC-1.8 GHz et le SHFLI DC-8.5 GHz. Le GHFLI et SHFLI contiennent chacun deux entr\u00e9es physiques qui fonctionnent comme deux lock-in ind\u00e9pendants. Chaque entr\u00e9e est \u00e9quip\u00e9e de 4 d\u00e9modulateurs qui permettent une analyse parall\u00e8le multi-harmoniques et multi-fr\u00e9quences, et d’un g\u00e9n\u00e9rateur de signaux de 6 G\u00e9ch\/s pour les signaux de commande et de r\u00e9f\u00e9rence. Les filtres des d\u00e9modulateurs peuvent \u00eatre r\u00e9gl\u00e9s pour obtenir le meilleur compromis entre la r\u00e9jection du bruit et la vitesse de mesure. Les interfaces num\u00e9riques USB et gigabit Ethernet permettent un transfert continu des donn\u00e9es vers l’ordinateur jusqu’\u00e0 4 M\u00e9ch\/s, tandis que les 4 sorties auxiliaires \u00e0 haute vitesse et de haute pr\u00e9cision permettent de convertir les r\u00e9sultats de mesure, avec une mise \u00e0 l’\u00e9chelle et un d\u00e9calage personnalis\u00e9, en signaux analogiques pour une int\u00e9gration avec d’autres instruments.<\/p>\n

 <\/p>\n

www.optonlaser.com<\/a><\/p>\n

www.optonlaser.com\/produit\/detection-synchrone-lock-in-amplifier<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"

Les d\u00e9tections synchrones ou lock-in amplifier sont un \u00e9l\u00e9ment essentiel des laboratoires de recherche dans des domaines tels que l’optique et la photonique, la nanotechnologie et la science des mat\u00e9riaux, la microscopie \u00e0 sonde locale et les capteurs. Du moment qu’une d\u00e9tection synchrone peut extraire de tr\u00e8s faibles signaux enfouis dans le bruit, il est […]<\/p>\n","protected":false},"author":36,"featured_media":400321,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[881],"tags":[935,911],"domains":[47],"ppma_author":[1154],"class_list":["post-400320","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-nouveaux-produits","tag-mesure","tag-testandmeasurement-fr","domains-electronique-eci"],"acf":[],"yoast_head":"D\u00e9tecter des signaux faibles \u00e0 des fr\u00e9quences GHz ...<\/title>\n<meta name=\"description\" content=\"Les d\u00e9tections synchrones ou lock-in amplifier sont un \u00e9l\u00e9ment essentiel des laboratoires de recherche dans des domaines tels que l’optique et la...\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.ecinews.fr\/fr\/wp-json\/wp\/v2\/posts\/400320\/\" \/>\n<meta property=\"og:locale\" content=\"fr_FR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"D\u00e9tecter des signaux faibles \u00e0 des fr\u00e9quences GHz\" \/>\n<meta property=\"og:description\" content=\"Les d\u00e9tections synchrones ou lock-in amplifier sont un \u00e9l\u00e9ment essentiel des laboratoires de recherche dans des domaines tels que l’optique et la photonique, la nanotechnologie et la science des mat\u00e9riaux, la microscopie \u00e0 sonde locale et les capteurs. 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