Nonlinear beam self-cleaning in a coupled cavity composite laser based on multimode fiber.

Date publication

septembre 2017

Journal

Optics express

Auteurs

Membres identifiés du Cancéropôle Est :
Pr MILLOT Guy

Tous les auteurs :
Guenard R, Krupa K, Dupiol R, Fabert M, Bendahmane A, Kermene V, Desfarges-Berthelemot A, Auguste JL, Tonello A, Barthélémy A, Millot G, Wabnitz S, Couderc V

Lien Pubmed

https://www.ncbi.nlm.nih.gov/pubmed/29041536

Résumé

We study a coupled cavity laser configuration where a passively Q-switched Nd:YAG microchip laser is combined with an extended cavity, including a doped multimode fiber. For appropriate coupling levels with the extended cavity, we observed that beam self-cleaning was induced in the multimode fiber thanks to nonlinear modal coupling, leading to a quasi-single mode laser output. In the regime of beam self-cleaning, laser pulse duration was reduced from 525 to 225 ps. We also observed a Q-switched mode-locked operation, where spatial self-cleaning was accompanied by far-detuned nonlinear frequency conversion in the active multimode fiber.

Référence

Opt Express. 2017 09 18;25(19):22219-22227