SEMICONDUCTOR LASER DEVICE AND OPTICAL COMMUNICATION DEVICE USING THE SAME

摘要

PROBLEM TO BE SOLVED: To provide a semiconductor laser device which oscillates in the long wavelength region and provides a small threshold current with high efficiency, and also to provide an optical communication device using the laser device. SOLUTION: An active layer is made in the form of a plurality of GaInNAs quantum dots. In particular, it is desirable to set the In composition to be not smaller than 0.4 but not larger than 1 and to set the N composition to be not smaller than 0.01 and not larger than 0.2.