Patent ID: 6288410
Filing Date: 2001-09-11
Classification: B82Y,H01S

Abstract:
An oscillation polarization-mode selective semiconductor laser comprising:a substrate; andan active region formed on said substrate, which comprises (1) a tensile-strained region, the tensile-strained region having a plurality of tensile-strained quantum well layers wherein at least one of said tensile-strained quantum well layers has a band gap different from that of the other tensile-strained quantum well layers, and (2) a compressively-strained region, the compressively-strained region having a plurality of compressively strained quantum well layers wherein at least one of said compressively strained quantum well layers has a band gap different from that of the other compressively strained quantum well layers, said oscillation polarization-mode selective semiconductor laser having a TE mode and a TM mode, and wherein TE mode and TM mode gains balance with each other, or are approximately equal to each other, in a wavelength range in which switching between the TE mode and the TM mode can be achieved.