Laser thermal control using thermoelectric cooler
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United States of America Patent
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-
Feb 11, 1997
Grant Date -
N/A
app pub date -
Apr 19, 1995
filing date -
Apr 19, 1995
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A system uses a parallel switch/thermoelectric cooler circuit between a voltage source and a subsystem having a laser diode in thermal contact with the thermoelectric cooler. The switch opens when the temperature is above a switch temperature such that current is supplied to the thermoelectric cooler in order to cool the laser. The thermoelectric cooler uses energy which would otherwise be wasted in a voltage regulator. The subsystem includes an optical transmitter using the laser to send signals. An alternate arrangement uses a pulse width modulator to provide proportional control for more precise regulation of the laser temperature.
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