{"id":61895,"date":"2023-12-21T13:26:25","date_gmt":"2023-12-21T11:26:25","guid":{"rendered":"https:\/\/www.iemn.fr\/?p=61895"},"modified":"2024-01-12T09:37:49","modified_gmt":"2024-01-12T07:37:49","slug":"frequency-stable-and-low-phase-noise-thz-synthesis-for-precision-spectroscopy","status":"publish","type":"post","link":"https:\/\/www.iemn.fr\/en\/newsletter\/frequency-stable-and-low-phase-noise-thz-synthesis-for-precision-spectroscopy.html","title":{"rendered":"Synth\u00e8se THz stable en fr\u00e9quence et \u00e0 faible bruit de phase pour la spectroscopie de pr\u00e9cision"},"content":{"rendered":"<section  class='av_textblock_section av-1kdsbbb-04f5b7cc54defdf80e8be7b70950327c'   itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/BlogPosting\" itemprop=\"blogPost\" ><div class='avia_textblock'  itemprop=\"text\" ><h1 style=\"text-align: center;\">Synth\u00e8se THz stable en fr\u00e9quence et \u00e0 faible bruit de phase pour la spectroscopie de pr\u00e9cision<\/h1>\n<\/div><\/section>\n<div  class='hr av-10h0k4n-493b80cd078e240de622c1db20afdbe4 hr-default  avia-builder-el-1  el_after_av_textblock  el_before_av_textblock'><span class='hr-inner'><span class=\"hr-inner-style\"><\/span><\/span><\/div>\n<section  class='av_textblock_section av-lqf2nrg3-2e03e5d91ce1030c1afa8dfdeccfae28'   itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/BlogPosting\" itemprop=\"blogPost\" ><div class='avia_textblock'  itemprop=\"text\" ><p style=\"text-align: center;\"><a href=\"https:\/\/www.iemn.fr\/wp-content\/uploads\/2023\/12\/Banc-de-manip-THz2-4.jpg\"><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter wp-image-62220 size-full\" src=\"https:\/\/www.iemn.fr\/wp-content\/uploads\/2023\/12\/Banc-de-manip-THz2-4.jpg\" alt=\"\" width=\"900\" height=\"345\" srcset=\"https:\/\/www.iemn.fr\/wp-content\/uploads\/2023\/12\/Banc-de-manip-THz2-4.jpg 900w, https:\/\/www.iemn.fr\/wp-content\/uploads\/2023\/12\/Banc-de-manip-THz2-4-300x115.jpg 300w, https:\/\/www.iemn.fr\/wp-content\/uploads\/2023\/12\/Banc-de-manip-THz2-4-768x294.jpg 768w, https:\/\/www.iemn.fr\/wp-content\/uploads\/2023\/12\/Banc-de-manip-THz2-4-18x7.jpg 18w, https:\/\/www.iemn.fr\/wp-content\/uploads\/2023\/12\/Banc-de-manip-THz2-4-705x270.jpg 705w\" sizes=\"auto, (max-width: 900px) 100vw, 900px\" \/><\/a><a href=\"https:\/\/www.iemn.fr\/wp-content\/uploads\/2023\/12\/Banc-de-manip-THz2-3.jpg\"><br \/>\n<\/a><\/p>\n<\/div><\/section>\n\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-lqyvlskl-a71debff50395603900b852ce7fb4e44\">\n.flex_column.av-lqyvlskl-a71debff50395603900b852ce7fb4e44{\nborder-radius:30px 30px 30px 30px;\npadding:40px 40px 40px 40px;\nbackground-color:#f2edde;\n}\n<\/style>\n<div  class='flex_column av-lqyvlskl-a71debff50395603900b852ce7fb4e44 av_one_full  avia-builder-el-3  el_after_av_textblock  el_before_av_one_full  first flex_column_div  column-top-margin'     ><style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-lqdlcbrn-3f8cf91efa018127332735c3494d4e0a\">\n#top .av_textblock_section.av-lqdlcbrn-3f8cf91efa018127332735c3494d4e0a .avia_textblock{\nfont-size:14px;\n}\n<\/style>\n<section  class='av_textblock_section av-lqdlcbrn-3f8cf91efa018127332735c3494d4e0a'   itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/BlogPosting\" itemprop=\"blogPost\" ><div class='avia_textblock'  itemprop=\"text\" ><p><strong>\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-qawvnx-1ad5929d774203653eaaeee575277a29\">\n.av_font_icon.av-qawvnx-1ad5929d774203653eaaeee575277a29{\ncolor:#761713;\nborder-color:#761713;\n}\n.av_font_icon.av-qawvnx-1ad5929d774203653eaaeee575277a29 .av-icon-char{\nfont-size:30px;\nline-height:30px;\n}\n<\/style>\n<span  class='av_font_icon av-qawvnx-1ad5929d774203653eaaeee575277a29 avia_animate_when_visible av-icon-style- avia-icon-pos-left avia-icon-animate'><span class='av-icon-char' aria-hidden='true' data-av_icon='\ue842' data-av_iconfont='entypo-fontello' ><\/span><\/span><\/strong><\/p>\n<p>Dans le cadre de l&rsquo;<strong>ANR Meteorit<\/strong> port\u00e9e par le CNRS, une approche robuste pour g\u00e9n\u00e9rer des ondes THz de tr\u00e8s grande puret\u00e9 a \u00e9t\u00e9 \u00e9valu\u00e9e sur une tr\u00e8s large bande, ici avec une accordabilit\u00e9 de 0,1 THz \u00e0 1,4 THz. Ce g\u00e9n\u00e9rateur \u00e0 bas bruit de phase pr\u00e9sente une d\u00e9rive de fr\u00e9quence de l&rsquo;ordre de quelques mHz\/s qui le rend particuli\u00e8rement adapt\u00e9 \u00e0 des mesures de spectroscopie, mais aussi comme onde porteuse stable et pure pour les transmissions THz \u00e0 tr\u00e8s haut d\u00e9bit.<br \/>\nL&rsquo;article tout r\u00e9cemment publi\u00e9 est une d\u00e9monstration exp\u00e9rimentale de son utilisation pour les mesures de spectroscopie mol\u00e9culaire en phase gazeuse de tr\u00e8s haute exactitude. De telles performances sont n\u00e9cessaires \u00e0 la communaut\u00e9 scientifique <strong>pour \u00e9valuer en particulier la stabilit\u00e9 spatio-temporelle des constantes fondamentales<\/strong>, objectif du projet ANR sus-cit\u00e9.<\/p>\n<div id=\"attachment_61953\" style=\"width: 305px\" class=\"wp-caption alignright\"><a href=\"..\/wp-content\/uploads\/2023\/12\/mesure-invariant.jpg\"><img loading=\"lazy\" decoding=\"async\" aria-describedby=\"caption-attachment-61953\" class=\"wp-image-61953 size-medium\" src=\"https:\/\/www.iemn.fr\/wp-content\/uploads\/2023\/12\/mesure-invariant-295x300.jpg\" alt=\"\" width=\"295\" height=\"300\" srcset=\"https:\/\/www.iemn.fr\/wp-content\/uploads\/2023\/12\/mesure-invariant-295x300.jpg 295w, https:\/\/www.iemn.fr\/wp-content\/uploads\/2023\/12\/mesure-invariant-80x80.jpg 80w, https:\/\/www.iemn.fr\/wp-content\/uploads\/2023\/12\/mesure-invariant-12x12.jpg 12w, https:\/\/www.iemn.fr\/wp-content\/uploads\/2023\/12\/mesure-invariant-36x36.jpg 36w, https:\/\/www.iemn.fr\/wp-content\/uploads\/2023\/12\/mesure-invariant.jpg 450w\" sizes=\"auto, (max-width: 295px) 100vw, 295px\" \/><\/a><p id=\"caption-attachment-61953\" class=\"wp-caption-text\">\u00ab\u00a0Mesure d&rsquo;un invariant de largeur de raie de 2 \u00e0 1200 GHz avec la source d\u00e9velopp\u00e9e\u00a0\u00bb<\/p><\/div>\n<p>L\u2019utilisation de ce type de sources THz pour les t\u00e9l\u00e9coms est par ailleurs pr\u00e9vue afin de pouvoir investir les formats de modulation \u00e0 haute efficacit\u00e9 spectrale (bit\/s\/Hz).<\/p>\n<p><em>Djevahirdjian, L., Lechevallier, L., Martin-Drumel, MA. et al. Frequency stable and low phase noise THz synthesis for precision spectroscopy. Nat Commun <strong>14<\/strong>, 7162 (2023). https:\/\/doi.org\/10.1038\/s41467-023-42905-z<\/em><\/p>\n<p class=\"MsoNormal\">\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-mqde7m-8fc8104f74d00adb8527e088b3143bb3\">\n.av_font_icon.av-mqde7m-8fc8104f74d00adb8527e088b3143bb3 .av-icon-char{\nfont-size:24px;\nline-height:24px;\n}\n<\/style>\n<span  class='av_font_icon av-mqde7m-8fc8104f74d00adb8527e088b3143bb3 avia_animate_when_visible av-icon-style- avia-icon-pos-left av-no-color avia-icon-animate'><span class='av-icon-char' aria-hidden='true' data-av_icon='\ue889' data-av_iconfont='entypo-fontello' ><\/span><\/span> <strong>Article complet<\/strong> : <a href=\"..\/wp-content\/uploads\/2023\/12\/s41467-023-42905-z.pdf\" target=\"_blank\" rel=\"noopener\">here<\/a><\/p>\n<p><a href=\"https:\/\/www.nature.com\/articles\/s41467-023-42905-z\" target=\"_blank\" rel=\"noopener\">\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-mqde7m-8fc8104f74d00adb8527e088b3143bb3\">\n.av_font_icon.av-mqde7m-8fc8104f74d00adb8527e088b3143bb3 .av-icon-char{\nfont-size:24px;\nline-height:24px;\n}\n<\/style>\n<span  class='av_font_icon av-mqde7m-8fc8104f74d00adb8527e088b3143bb3 avia_animate_when_visible av-icon-style- avia-icon-pos-left av-no-color avia-icon-animate'><span class='av-icon-char' aria-hidden='true' data-av_icon='\ue889' data-av_iconfont='entypo-fontello' ><\/span><\/span> https:\/\/www.nature.com\/articles\/s41467-023-42905-z<\/a><\/p>\n<\/div><\/section><\/div>\n\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-t2ad47-18c54ff1c5d7e07a05cbb0d2b9425bcb\">\n.flex_column.av-t2ad47-18c54ff1c5d7e07a05cbb0d2b9425bcb{\nborder-radius:40px 40px 40px 40px;\npadding:40px 40px 40px 40px;\n}\n<\/style>\n<div  class='flex_column av-t2ad47-18c54ff1c5d7e07a05cbb0d2b9425bcb av_one_full  avia-builder-el-8  el_after_av_one_full  avia-builder-el-last  first flex_column_div  column-top-margin'     ><div  class='avia-buttonrow-wrap av-lqdm3rkh-11368b057680c3fb3c564a2e8f5a5287 avia-buttonrow-center  avia-builder-el-9  avia-builder-el-no-sibling'>\n\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-jtj747-a7e0b6fce90150be7e571029ebe40383\">\n#top #wrap_all .avia-button.av-jtj747-a7e0b6fce90150be7e571029ebe40383{\nmargin-bottom:20px;\nmargin-right:10px;\nmargin-left:10px;\n}\n<\/style>\n<a href='mailto:guillaume.ducournau@univ-lille.fr'  class='avia-button av-jtj747-a7e0b6fce90150be7e571029ebe40383 avia-icon_select-yes-left-icon avia-size-small avia-color-theme-color'   aria-label=\"Guillaume Ducournau\"><span class='avia_button_icon avia_button_icon_left' aria-hidden='true' data-av_icon='' data-av_iconfont='entypo-fontello'><\/span><span class='avia_iconbox_title' >Guillaume Ducournau<\/span><\/a>\n\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-v33oef-eb3351cf197d67e950d8b489bf44f16e\">\n#top #wrap_all .avia-button.av-v33oef-eb3351cf197d67e950d8b489bf44f16e{\nmargin-bottom:20px;\nmargin-right:10px;\nmargin-left:10px;\n}\n<\/style>\n<a href='mailto:redha.kassi@univ-lille.fr'  class='avia-button av-v33oef-eb3351cf197d67e950d8b489bf44f16e avia-icon_select-yes-left-icon avia-size-small avia-color-theme-color'   aria-label=\"R\u00e9dha Kassi\"><span class='avia_button_icon avia_button_icon_left' aria-hidden='true' data-av_icon='' data-av_iconfont='entypo-fontello'><\/span><span class='avia_iconbox_title' >R\u00e9dha Kassi<\/span><\/a>\n<\/div><\/div>","protected":false},"excerpt":{"rendered":"","protected":false},"author":20,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[297],"tags":[],"class_list":["post-61895","post","type-post","status-publish","format-standard","hentry","category-newsletter"],"_links":{"self":[{"href":"https:\/\/www.iemn.fr\/en\/wp-json\/wp\/v2\/posts\/61895","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.iemn.fr\/en\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.iemn.fr\/en\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.iemn.fr\/en\/wp-json\/wp\/v2\/users\/20"}],"replies":[{"embeddable":true,"href":"https:\/\/www.iemn.fr\/en\/wp-json\/wp\/v2\/comments?post=61895"}],"version-history":[{"count":1,"href":"https:\/\/www.iemn.fr\/en\/wp-json\/wp\/v2\/posts\/61895\/revisions"}],"predecessor-version":[{"id":78067,"href":"https:\/\/www.iemn.fr\/en\/wp-json\/wp\/v2\/posts\/61895\/revisions\/78067"}],"wp:attachment":[{"href":"https:\/\/www.iemn.fr\/en\/wp-json\/wp\/v2\/media?parent=61895"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.iemn.fr\/en\/wp-json\/wp\/v2\/categories?post=61895"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.iemn.fr\/en\/wp-json\/wp\/v2\/tags?post=61895"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}