Sony Corporation

Osamu Yoneyama

Takayoshi Mamine

Isao Umezawa

Tatsuji Oda

Haruo Sone

A semiconductor laser comprising a laser diode which is mounted on a semiconductor chip which has a monitoring photodiode formed therein so as to monitor the laser light output of the laser diode. The cathode of the laser diode and the anode of the monitoring photodiode are connected together, and a suitable forward voltage for the laser diode and reverse voltage for the monitor photodiode is provided by a single power supply which results in a simple construction of an output detection circuit for the monitor photodiode which produces an increased output over prior art devices.

Semiconductor laser chip

A semiconductor laser device having a stripe light emission region formed in an active layer, a bent portion formed in the active layer on a light end portion of the light emission region in a range of approximately the width of the light emission region, and a flat portion formed in the active layer the width of which is made larger than that of the light emission region inside of the end portion of the light emission region.

Growing community of inventors

Hiratsuka, Japan

Osamu Yoneyama