Abstract

This article presents the squeezed light generation from a quantum well semiconductor laser with an external grating. The lasers used in our experiment (0.98 and 1.3 mkm) do not possess perfect single frequency longitudinal mode spectrum in a free running mode. The best of the lasers perform single longitudinal mode operation in a current range up to the two times threshold with 20-35 dB side-mode suppression and exhibit photon flux noise 3 dB large than shot noise level. With the help of external grating the single frequency generation was stabilised in a pump current range from the threshold up to the current I = 4.5I_th. Mesa-stripe separate confinement single quantum well InGaAsP/lnP laser diodes (0.8 and 1.3 mkm) based on heterostructure grown by the modified version of liquid phase epitaxy were used in the experiment. All of the lasers were grown in Ioffe Institute.

© 1996 IEEE