Nos chercheurs & Techniciens

Patricia SEGONDS

Personnel Chercheur UGA

Équipe OPTIMA : Optics and Materials

Overview

Professor, specialist in nonlinear optics

At Bordeaux until 1998, I joined the CPMOH (Centre de Physique Moléculaire et d’Optique Hertzienne) as an associate professor from the Physics Department of Bordeaux University where I managed a new research team with Pr. Laurent Sarger. We studied in the time-domain third-order nonlinear optical properties from Kerr effect in doped glasses by using a commercial high repetition rate femtosecond Ti:Sa laser. It was coupled with a pump-probe technic based on a Mach-Zehnder interferometer entirely built at the lab to measure directly the magnitude of nonlinear indices induced by spontaneous electronic transitions in doped glasses. Doping conditions providing the highest values of nonlinear indices were targeted for using the glasses in all-optical switching.

My main coworkers were Laurent Sarger, André Ducasse, Lionel Canioni and Frédéric Adamietz. We worked in strong collaboration with Gilles LeFlem, Evelyne Fargin and Thierry Cardinal from ICMCB (Institut de la Chimie et de la Matière Condensée).

Since at Grenoble, I joined first SPECTRO (Laboratoire de Spectrométrie Physique) where Pr. Benoit Boulanger and myself created a new research team. We moved to Neel Institute in 2007 when just opened and I became professor from the Physics Department of UGA. I am now a specialist of optical properties in new nonlinear crystals with the study their potentiality for the generation of parametric light in the infrared and Terahertz ranges, from phase-matched second-order processes; the first experimental demonstration of Angular-Quasi-Phase-Matching (AQPM) in large-aperture periodically poled ferroelectric crystals; New architectures of OPO devices based on a rotating nonlinear crystal shaped as a partial cylinder for a continuous and wide tunability. For more information…..

My main co-workers at Neel Institute are Benoit Boulanger, Alexandra Peña Ravellez, Bertrand Ménaert, Jérôme Debray, David Jegouso and Corinne Félix.