INTEGRATED SEMICONDUCTOR LASER ELEMENT AND SEMICONDUCTOR LASER MODULE

摘要

An integrated semiconductor laser device with a semiconductor laser and a semiconductor optical amplifier for amplifying output laser light of the semiconductor laser integrated on a substrate, the integrated semiconductor laser device including: a first active layer included in the semiconductor laser; and a second active layer included in the semiconductor optical amplifier, wherein the first active layer and the second active layer have a multiple quantum well structure, and the second active layer has a larger number of quantum wells than the first active layer. This provides an integrated semiconductor laser device and a semiconductor laser module whose output laser light has a narrow spectral linewidth and high intensity.