{"id":161,"date":"2010-11-18T11:01:45","date_gmt":"2010-11-18T10:01:45","guid":{"rendered":"https:\/\/samovar2022.int-evry.fr\/index.php\/2010\/11\/18\/soutenance-these-de-robert-farha\/"},"modified":"2020-09-04T18:47:17","modified_gmt":"2020-09-04T16:47:17","slug":"soutenance-these-de-robert-farha","status":"publish","type":"post","link":"https:\/\/samovar.telecom-sudparis.eu\/index.php\/2010\/11\/18\/soutenance-these-de-robert-farha\/","title":{"rendered":"SOUTENANCE : th\u00e8se de Robert Farha"},"content":{"rendered":"

lundi 20 Septembre 2010<\/strong>
\n\u00ab\u00a0\u00c9tude d’une structure \u00e0 cristal photonique grav\u00e9e dans un guide Ti:LiNbO3 dop\u00e9 erbium pour l’\u00e9mission de la lumi\u00e8re \u00e0 1550 nm<\/strong>\u00ab\u00a0.<\/p>\n

lundi 20 Septembre 2010<\/strong> \u00e0 TELECOM SudParis, Evry \u00e0 10h:30<\/strong>, en salle A02.<\/p>\n

jury<\/strong> :<\/p>\n

– Mme. Maria-Pilar Bernal, Charg\u00e9e de recherche CNRS (HDR) \u00e0 FEMTO-ST
\n Rapporteur
\n– M. Elhadj DOGHECHE, Professeur \u00e0 l’Universit\u00e9 de Valencienne
\net chercheur \u00e0 l’IEMN Rapporteur<\/p>\n

– M. George ALQUIE, Professeur \u00e0 l’Universit\u00e9 Paris 6
\n Examinateur<\/p>\n

– M. Razvigor OSSIKOVSKI, Ma\u00eetre de Conf\u00e9rences (HDR) \u00e0 l’Ecole
\nPolytechnique, LPICM Examinateur<\/p>\n

– M. Elias RACHID, Ma\u00eetre de Conf\u00e9rences \u00e0 l’Universit\u00e9 Saint
\nJoseph ESIB, Liban Examinateur<\/p>\n

– M. Qin ZOU, Ma\u00eetre de Conf\u00e9rences (HDR) \u00e0 TELECOM
\nSudParis Co-directeur de th\u00e8se<\/p>\n

– M. Badr-Eddine BENKELFAT, Professeur \u00e0 TELECOM SudParis
\n Co-directeur de th\u00e8se<\/p>\n

R\u00e9sum\u00e9<\/strong>:<\/p>\n

La r\u00e9alisation d’un laser en optique int\u00e9gr\u00e9e sur niobate de lithium dop\u00e9 erbium passe par la cr\u00e9ation d’une cavit\u00e9 Fabry-P\u00e9rot. Cette cavit\u00e9 peut \u00eatre obtenue de mani\u00e8re classique en d\u00e9posant des miroirs di\u00e9lectriques multicouches aux extr\u00e9mit\u00e9s du guide d’onde. Des probl\u00e8mes de fiabilit\u00e9 de fabrications de ces miroirs peuvent \u00eatre contourn\u00e9s en utilisant des r\u00e9seaux de Bragg grav\u00e9s \u00e0 la surface du guide d’onde. Une autre approche, c’est un laser DFB bien connu, dans ce cas le coeur du guide \u00e0 contraste d’indice, est structur\u00e9 p\u00e9riodiquement par des r\u00e9seaux de Bragg aussi grav\u00e9s \u00e0 la surface.<\/p>\n

Cette th\u00e8se pr\u00e9sente une nouvelle configuration d?un cristal photonique (CP) 2D de forme originale LOM (pour Laterally
\nOver-Modulated) pour remplacer les r\u00e9seaux de Bragg grav\u00e9s \u00e0 la surface de guide d?onde de titane diffus\u00e9 sur un substrat de niobate de lithium dop\u00e9 erbium.<\/p>\n

Ce travail de th\u00e8se s’inscrit dans ce mouvement. Son but est la conception, la fabrication et la caract\u00e9risation de LOM, destin\u00e9es \u00e0 r\u00e9aliser un laser \u00e9mettant \u00e0 ? = 1,55?m r\u00e9pondant aux exigences de l’int\u00e9gration photonique. La structure LOM propos\u00e9e vise en m\u00eame temps :<\/p>\n

–\tLe renforcement de l?\u00e9mission spontan\u00e9e par effet Purcell dans un
\nmilieu amplificateur o\u00f9 le couplage, de la sur-modulation de l’indice optique CP1D (effet Bragg) et CP2D (BIP), replie les relations de dispersion et cr\u00e9e de fait des r\u00e9gions de faible vitesse de groupe.<\/p>\n

–\tLe remplacement de la configuration Fabry-P\u00e9rot n\u00e9cessitant un d\u00e9p\u00f4t
\nde couche di\u00e9lectrique par une structure DFB r\u00e9alisable en une seule \u00e9tape de fabrication, d?o\u00f9 le choix de la technologie FIB \u00ab Focused Ion Beam \u00bb.<\/p>\n

L’optimisation de LOM occupe une partie du travail. Des simulations num\u00e9riques ont \u00e9t\u00e9 men\u00e9es en deux dimensions par un logiciel \u00abRSoft\u00bb, utilisant les techniques des ondes planes et FDTD, pour obtenir un meilleur rendement de transmission possible autour de 1.55?m.<\/p>\n

En accord avec les simulations, nous pr\u00e9sentons la r\u00e9alisation et la caract\u00e9risation de LOM dans un guide d?onde Er:Ti:LiNbO3 de coupe X propagation Z pomp\u00e9 \u00e0 980nm par une diode laser continue. Un gain d’amplification de 9 dB a \u00e9t\u00e9 obtenu pour un LOM de 780 trous d’air de diam\u00e8tre 290nm et de p\u00e9riode 540nm constituant une surface de (22\u00b5m X 9\u00b5m). L’\u00e9tape suivante consiste \u00e0 am\u00e9liorer le LOM pour arriver \u00e0 cr\u00e9er un laser int\u00e9gr\u00e9.<\/p>\n

Abstract<\/strong>:<\/p>\n

Achieving a laser optics integrated erbium doped lithium niobate is through the creation of a Fabry-Perot cavity. This cavity can be obtained in classical way applicant multilayer dielectric mirrors at the ends of the wave guide. These mirrors manufacturing reliability problems can be bypassed using networks of Bragg engraved on the surface of the wave guide. Another approach, it is a well-known DFB laser in this case the heart Guide These mirrors manufacturing reliability problems can be bypassed using networks of Bragg engraved on the surface of the wave guide. Another approach, it is a well-known DFB laser in this case the heart Guide Index-contrast, is structured by Bragg networks also burned area periodically. This thesis presents a new configuration of a Photonics cristal (CP) 2D LOM (for Laterally
\nOver-Modulated) original form to replace burned guide wave broadcast on a substrate of erbium doped lithium niobate titanium surface Bragg networks. This thesis work is part of this movement. Its goal is the design, manufacture, and characterization of LOM, intended to achieve a laser emitting ? = 1, meets the requirements of Photonics integration 55?m. The LOMintended to achieve a laser emitting ? = 1, meets the requirements of Photonics integration 55?m. The LOM proposed structure aims at the same time: strengthening of spontaneous effect Purcell amplifier environment where coupling, the sur-modulation CP1D (Bragg effect) and CP2D (BIP), optical index fallback dispersion relations and creates de facto to regions of low speed Group issued.
\nReplacing the Fabry-P\u00e9rot requiring a deposit by a workable DFB structure one-step production, dielectric layer configuration where
\nthe choice of technology FIB \u00ab\u00a0Focused Ion Beam\u00a0\u00bb. Optimization of
\nLOM occupies part of the work. Numerical simulations were conducted in two dimensions by software \u00ab\u00a0RSoft\u00a0\u00bb, using the techniques of Planar waves and FDTD, for bestperformance possible transmission around 1.55?m. Agree with simulations, we present the achievement and characterisation of LOM in an ER: Ti: LiNbO3 cutting propagation Z X wave guide to 980nm pumped by a laser diode continues. Gain 9 dB amplification was obtained for LOM 780 hole diameter 290nm and period air 540nm constituting a surface (22\u00b5m X 9\u00b5m). The next step is to improve the LOM to create an integrated laser.<\/p>\n

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lundi 20 Septembre 2010 \u00ab\u00a0\u00c9tude d’une structure \u00e0 cristal photonique grav\u00e9e dans un guide Ti:LiNbO3 dop\u00e9 erbium pour l’\u00e9mission de la lumi\u00e8re \u00e0 1550 nm\u00ab\u00a0. lundi 20 Septembre 2010 \u00e0 TELECOM SudParis, Evry \u00e0 10h:30, en salle A02. jury : – Mme. Maria-Pilar Bernal, Charg\u00e9e de recherche CNRS (HDR) \u00e0 FEMTO-ST Rapporteur – M. Elhadj […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"ocean_post_layout":"","ocean_both_sidebars_style":"","ocean_both_sidebars_content_width":0,"ocean_both_sidebars_sidebars_width":0,"ocean_sidebar":"","ocean_second_sidebar":"","ocean_disable_margins":"enable","ocean_add_body_class":"","ocean_shortcode_before_top_bar":"","ocean_shortcode_after_top_bar":"","ocean_shortcode_before_header":"","ocean_shortcode_after_header":"","ocean_has_shortcode":"","ocean_shortcode_after_title":"","ocean_shortcode_before_footer_widgets":"","ocean_shortcode_after_footer_widgets":"","ocean_shortcode_before_footer_bottom":"","ocean_shortcode_after_footer_bottom":"","ocean_display_top_bar":"default","ocean_display_header":"default","ocean_header_style":"","ocean_center_header_left_menu":"","ocean_custom_header_template":"","ocean_custom_logo":0,"ocean_custom_retina_logo":0,"ocean_custom_logo_max_width":0,"ocean_custom_logo_tablet_max_width":0,"ocean_custom_logo_mobile_max_width":0,"ocean_custom_logo_max_height":0,"ocean_custom_logo_tablet_max_height":0,"ocean_custom_logo_mobile_max_height":0,"ocean_header_custom_menu":"","ocean_menu_typo_font_family":"","ocean_menu_typo_font_subset":"","ocean_menu_typo_font_size":0,"ocean_menu_typo_font_size_tablet":0,"ocean_menu_typo_font_size_mobile":0,"ocean_menu_typo_font_size_unit":"px","ocean_menu_typo_font_weight":"","ocean_menu_typo_font_weight_tablet":"","ocean_menu_typo_font_weight_mobile":"","ocean_menu_typo_transform":"","ocean_menu_typo_transform_tablet":"","ocean_menu_typo_transform_mobile":"","ocean_menu_typo_line_height":0,"ocean_menu_typo_line_height_tablet":0,"ocean_menu_typo_line_height_mobile":0,"ocean_menu_typo_line_height_unit":"","ocean_menu_typo_spacing":0,"ocean_menu_typo_spacing_tablet":0,"ocean_menu_typo_spacing_mobile":0,"ocean_menu_typo_spacing_unit":"","ocean_menu_link_color":"","ocean_menu_link_color_hover":"","ocean_menu_link_color_active":"","ocean_menu_link_background":"","ocean_menu_link_hover_background":"","ocean_menu_link_active_background":"","ocean_menu_social_links_bg":"","ocean_menu_social_hover_links_bg":"","ocean_menu_social_links_color":"","ocean_menu_social_hover_links_color":"","ocean_disable_title":"default","ocean_disable_heading":"default","ocean_post_title":"","ocean_post_subheading":"","ocean_post_title_style":"","ocean_post_title_background_color":"","ocean_post_title_background":0,"ocean_post_title_bg_image_position":"","ocean_post_title_bg_image_attachment":"","ocean_post_title_bg_image_repeat":"","ocean_post_title_bg_image_size":"","ocean_post_title_height":0,"ocean_post_title_bg_overlay":0.5,"ocean_post_title_bg_overlay_color":"","ocean_disable_breadcrumbs":"default","ocean_breadcrumbs_color":"","ocean_breadcrumbs_separator_color":"","ocean_breadcrumbs_links_color":"","ocean_breadcrumbs_links_hover_color":"","ocean_display_footer_widgets":"default","ocean_display_footer_bottom":"default","ocean_custom_footer_template":"","ocean_post_oembed":"","ocean_post_self_hosted_media":"","ocean_post_video_embed":"","ocean_link_format":"","ocean_link_format_target":"self","ocean_quote_format":"","ocean_quote_format_link":"post","ocean_gallery_link_images":"on","ocean_gallery_id":[],"footnotes":""},"categories":[7],"tags":[],"class_list":["post-161","post","type-post","status-publish","format-standard","hentry","category-uncategorized-fr","entry"],"_links":{"self":[{"href":"https:\/\/samovar.telecom-sudparis.eu\/index.php\/wp-json\/wp\/v2\/posts\/161","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/samovar.telecom-sudparis.eu\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/samovar.telecom-sudparis.eu\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/samovar.telecom-sudparis.eu\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/samovar.telecom-sudparis.eu\/index.php\/wp-json\/wp\/v2\/comments?post=161"}],"version-history":[{"count":1,"href":"https:\/\/samovar.telecom-sudparis.eu\/index.php\/wp-json\/wp\/v2\/posts\/161\/revisions"}],"predecessor-version":[{"id":2064,"href":"https:\/\/samovar.telecom-sudparis.eu\/index.php\/wp-json\/wp\/v2\/posts\/161\/revisions\/2064"}],"wp:attachment":[{"href":"https:\/\/samovar.telecom-sudparis.eu\/index.php\/wp-json\/wp\/v2\/media?parent=161"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/samovar.telecom-sudparis.eu\/index.php\/wp-json\/wp\/v2\/categories?post=161"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/samovar.telecom-sudparis.eu\/index.php\/wp-json\/wp\/v2\/tags?post=161"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}