Semiconductor laser device, semiconductor laser module, and fiber module

摘要

A semiconductor laser device comprises a semiconductor laser chip comprising a semiconductor substrate and a compound semiconductor layer formed thereon, a base substrate formed of CuW, having a side on which the semiconductor laser chip is fixed in a junction-down fashion, and an intermediate section disposed on the side of the base substrate, comprising an electrically insulating portion and an electrically conductive portion insulated from the base substrate by the electrically insulating portion, the semiconductor substrate of the semiconductor laser chip and the electrically conductive portion being electrically interconnected. The semiconductor device of this construction is capable of outputting high power with high reliability over a long span.