L’Institut Foton vous convie \u00e0 la pr\u00e9sentation des travaux de th\u00e8se de doctorat :<\/p>\n\n\n\n
Peignes de fr\u00e9quences \u00e0 diversit\u00e9 de polarisation dans les lasers \u00e0 solides dop\u00e9s ytterbium<\/strong><\/p>\n\n\n\n Gaedze Kudjo HERMAN AKAGLA<\/strong><\/p>\n\n\n\n sous la direction de Marc BRUNEL<\/p>\n\n\n\n La soutenance aura lieu le jeudi\u00a017 octobre \u00e0 9h30 en salle des th\u00e8ses, B\u00e2t. 1, Campus de Beaulieu.<\/strong><\/p>\n\n\n\n Title: <\/strong>Polarization diversity frequency combs in ytterbium-doped solid-state lasers <\/p>\n\n\n\n Keywords: <\/strong>Ytterbium, dual-frequency laser, polarization, dual-comb<\/p>\n\n\n\n Abstract: <\/strong>Ytterbium lasers are widely used for short pulse generation, in particular for dual- comb spectroscopy. In this thesis work, we ex- perimentally developed specific laser architec- tures for ytterbium-doped solid-state lasers, such as: Yb:YAG, Yb:Lu:YAG, Yb:Na:CNGG and Yb:CaF2. In these quasi-isotropic active media, two eigenstates with orthogonal polar- izations can oscillate simultaneously, generat- ing two pulse trains that can be synchronous or asynchronous, depending on the type of cavity architecture. We first show that the orientation of the pump polarization is an ef- fective tool of power control in bipolarized ytterbium lasers. The experimental results ob- tained are then compared with a two-mode rate-equation model taking into account the pump-induced gain anisotropy and the cross- saturation in the active medium. Secondly, we experimentally demonstrate a dual fre- quency comb with synchronous pulse trains in Yb:YAG and Yb:Lu:YAG bipolarized passive mode-locked lasers containing two intracavity quarter-wave plates. Finally, the achievement of an asynchronous dual-frequency comb in the Yb:YAG laser, as well as the tunability of the repetition rates, has been demonstrated.<\/p>\n\n\n\n <\/p>\n\n\n\n <\/p>\n\n\n\n <\/p>\n\n\n\n <\/p>\n","protected":false},"excerpt":{"rendered":" L’Institut Foton vous convie \u00e0 la pr\u00e9sentation des travaux de th\u00e8se de doctorat : Peignes de fr\u00e9quences \u00e0 diversit\u00e9 de polarisation dans les lasers \u00e0 solides dop\u00e9s ytterbium Gaedze Kudjo HERMAN AKAGLA sous la direction de Marc BRUNEL La soutenance<\/p>\n","protected":false},"author":6,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"inline_featured_image":false,"footnotes":""},"categories":[37],"tags":[],"class_list":["post-9797","post","type-post","status-publish","format-standard","hentry","category-agenda"],"translation":{"provider":"WPGlobus","version":"3.0.2","language":"en","enabled_languages":["fr","en"],"languages":{"fr":{"title":true,"content":true,"excerpt":false},"en":{"title":false,"content":false,"excerpt":false}}},"_links":{"self":[{"href":"https:\/\/www.institut-foton.eu\/en\/wp-json\/wp\/v2\/posts\/9797","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.institut-foton.eu\/en\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.institut-foton.eu\/en\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.institut-foton.eu\/en\/wp-json\/wp\/v2\/users\/6"}],"replies":[{"embeddable":true,"href":"https:\/\/www.institut-foton.eu\/en\/wp-json\/wp\/v2\/comments?post=9797"}],"version-history":[{"count":8,"href":"https:\/\/www.institut-foton.eu\/en\/wp-json\/wp\/v2\/posts\/9797\/revisions"}],"predecessor-version":[{"id":9885,"href":"https:\/\/www.institut-foton.eu\/en\/wp-json\/wp\/v2\/posts\/9797\/revisions\/9885"}],"wp:attachment":[{"href":"https:\/\/www.institut-foton.eu\/en\/wp-json\/wp\/v2\/media?parent=9797"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.institut-foton.eu\/en\/wp-json\/wp\/v2\/categories?post=9797"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.institut-foton.eu\/en\/wp-json\/wp\/v2\/tags?post=9797"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}