Patent ID: 8279519
Filing Date: 2012-10-02
Classification: B82Y,G02F,H01S

Abstract:
1. A semiconductor optical amplifier, comprising: a GaAs substrate; a gain region formed on said GaAs substrate; and p-side and an n-side electrodes for injecting electric current into said gain region, said gain region comprising a semiconductor layer selected from the group consisting of: GaNAs, GaInNAs, GaNAsSb and GaInNAsSb, said gain region having an incident end and an exit end, said semiconductor optical amplifier amplifying a laser beam incident to said incident end and emitting said laser beam from said exit end after amplification, and wherein said gain region has a multiple quantum well structure including a stack of a plurality of quantum well layers, said quantum well layers having a composition selected from the group consisting of GaNAs, GaInNAs, GaNAsSb and GaInNAsSb, said quantum well layers each having a respective bandgap that is different from that of the other quantum well layers.