Thermoelectric cooler control circuit

Details Thermoelectric cooler control circuit Thermoelectric cooler control circuit

1985-07-22

1986-12-23

Scott, Jr., Leon

Coherent light generators

Particular component circuitry

Optical pumping

372 34, 372 29, H01S 300

Patent

active

046317287

ABSTRACT:
A thermoelectric cooler control circuit for a laser diode that has its terature regulated by a thermoelectric cooler and its temperature sensed by a laser diode temperature sensor. The purpose of the control circuit is to regulate the thermoelectric cooler to maintain the laser diode at a constant temperature. The output of the laser diode temperature sensor is amplified and compared to a reference voltage in an integrator. The output of the integrator controls a pulse width modulator that controls a switching transistor that varies the pulse duration of power applied to a filter network. The power output of the filter network is applied to a mode controller that is controlled by the output of the integrator so that the mode controller switches the direction that power is applied to the thermoelectric cooler to maintain the temperature of the laser diode at a constant level.

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