Difference in partition noise for 1.55 μm quantum-dash and bulk structures

Jean-François Hayau (1) , Julien Poette (1) , Vincent Roncin (1) , Pascal Besnard (1) , François Lelarge (2) , Benjamin Rousseau (2) , Loïc Le Gouezigou (2) , Frédéric Pommereau (2) , Francis Poingt (2) , Odile Legouezigou (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

The comparison of relative intensity noise (Rin) shows improved performances, for quantum dash laser (QD) compared to the ones of bulk medium structures. We introduced a statistical measurement through a coupling parameter that reveals the impact of strong damping on the competition between modes or the so-called partition noise. The existence of a strong damping in QD laser prevents the relaxation frequency from being observed in the coupling parameter, which makes the noise to appear as if the laser lines were inhomogeneous. However the method also enables the characterization of the coupling strength between modes, showing again differences between QD and bulk structures.

Domaines: Optique / photonique

Jean-François Hayau, Julien Poette, Vincent Roncin, Pascal Besnard, François Lelarge, et al.. Difference in partition noise for 1.55 μm quantum-dash and bulk structures. SPIE Photonics Europe 2008, Apr 2008, Strasbourg, France. pp.69970S, ⟨10.1117/12.781490⟩. ⟨hal-01958630⟩