The Furukawa Electric Co., Ltd.

Chihomi Furuhashi

Takeshi Aikiyo

Yoshikazu Ikegami

Takashi Koseki

The invention provides a semiconductor laser module which can suppress overcurrent flowing into a thermo-module, wherein the thermo-module () carries out a heating action when a reverse current flows from lead pin () through lead pin (), and contrarily carries out a cooling action when a current flows from the lead pin () through the lead pin (). An overcurrent limiting means () is provided, which can suppress overcurrent flowing into the thermo-module () in its heating direction. The overcurrent limiting circuit () is provided with a bypass line (), a resistor (), and a diode (). When a current flows in the heating direction, the diode () is turned on, whereby the current is shunted to the thermo-module () and bypass line () for flow, and accordingly, the overcurrent flowing into the thermo-module () can be effectively suppressed.

Semiconductor laser module, and method for driving the semiconductor laser module

An optical communication device which has an optical module including an optical element and a lens system optically coupled through a space and housed in a package, a supporting member for supporting the optical module, and a fixing member directly placed over the optical module for removably fixing the optical module on the supporting member, wherein the optical module is securely sandwiched between the supporting member and the fixing member, and a method of fixing the optical module for use in the optical communication device.

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Tokyo, Japan

Chihomi Furuhashi