Optical transmitting module and a method for controlling the...

Details Optical transmitting module and a method for controlling the... Optical transmitting module and a method for controlling the...

2007-09-11

2007-09-11

Nguyen, Dung (Department: 2828)

Coherent light generators

Particular temperature control

C372S038020, C372S038070

Reexamination Certificate

active

10761427

ABSTRACT:
The present invention provides a semiconductor laser module that reduces a shift of the output wavelength after the laser diode is practically operated. The laser module comprises the semiconductor laser, a thermistor, a thermoelectric cooler, a heater and a controller. When the temperature of the laser diode is out of a preset range, the heater is supplied a current for simulating the self-heating of the laser diode. After the temperature of the laser diode falls within the preset range, the current supplied to the heater is shut off and the laser diode is practically driven by providing the bias and the modulation currents thereto.

REFERENCES:
patent: 4730112 (1988-03-01), Wong
patent: 5019769 (1991-05-01), Levinson
patent: 2003/0081289 (2003-05-01), Oomori et al.
patent: 2004/0004980 (2004-01-01), Mazed

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