Experimental investigation of relaxation oscillations resonance in mode-locked Fabry-Perot semiconductor lasers

Vincent Roncin (1) , Julien Poette (1) , Jean-François Hayau (1) , Pascal Besnard (1) , Jean-Claude Simon (1) , F. van Dijk (2) , Alexandre Shen (2) , Guang-Hua Duan (2)

1 FOTON - Fonctions Optiques pour les Technologies de l'informatiON
2 III-V Lab - Alcatel-Thalès III-V lab

We propose in this communication an experimental study of the relaxation oscillations behavior in mode-locked lasers. The semiconductor self-pulsating laser diode is composed by two gain sections, without saturable absorber. It is made of bulk structure and designed for optical telecommunication applications. This specific device allows two different regimes of optical modulation: the first one corresponds to the resonance of the relaxation oscillations and the second one, to the mode-locking regime at FSR value. This singular behavior leads us to characterize the self-pulsations which are coexisting in the laser and to describe two regimes of output modulation: the first one appears thanks to the resonance of the oscillation relaxation and the other one corresponds to the FSR of the Fabry-Perot laser at 40 GHz.

Mots clés: Semiconductor lasers; Fabry-Perot; laser cavity resonators; Self-pulsating laser; Mode-locked lasers; Relaxation oscillations; Optical pulse generation

Domaines: Optique [physics.optics]; Optique / photonique

Vincent Roncin, Julien Poette, Jean-François Hayau, Pascal Besnard, Jean-Claude Simon, et al.. Experimental investigation of relaxation oscillations resonance in mode-locked Fabry-Perot semiconductor lasers. SPIE Photonics Europe, Apr 2008, Strasbourg, France. pp.69971X, ⟨10.1117/12.781629⟩. ⟨hal-00989911⟩