| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide optical communication equipment with a semiconductor laser module, which prevents an excessive thermo module current from flowing in the heating direction of a thermo module in the semiconductor laser module, and can operate safely and accurately. <P>SOLUTION: In a semiconductor laser module 1 for exciting an optical fiber amplifier 30, when a thermo module current Itec energized to a thermo module 5 to set a semiconductor laser element 2 to a desired temperature is adjusted based on a temperature T (a thermistor indication temperature Ts) of the semiconductor laser element 2, the maximum allowable current value Itex (max) in the heating direction of the thermo module current when the semiconductor laser element 2 reaches a specific maximum temperature T (max) is calculated based on an environment temperature Tc and drive current Iop at an arithmetic processing section 24, and the level of the thermo module current Itec is limited to the maximum allowable current value Itec (max) or less by a control section 25. <P>COPYRIGHT: (C)2003,JPO |
