Laser beam emitting apparatus

Details Laser beam emitting apparatus Laser beam emitting apparatus

1997-06-12

1999-08-10

Davie, James W.

Coherent light generators

Particular component circuitry

Optical pumping

372 22, 372 31, 372 34, 372 36, H01S 3042

Patent

active

059369876

ABSTRACT:
The present invention relates to a laser beam emitting apparatus employing a semiconductor laser or the like and, more particularly, to a laser beam emitting apparatus capable of operating at low power consumption. A Peltier device driving unit of the present invention drives a Peltier device included in the laser beam emitting apparatus provided with an optical resonator having at least a laser crystal and an output mirror. A switching regulator generates a voltage corresponding to the duty factor of a pulse width modulator. An H-bridge changes the flowing direction of a current supplied to the Peltier device. The H-bridge comprises p-channel FETs, and n-channel FETS connected in parallel with the p-channel FETS.

REFERENCES:
patent: 5703893 (1997-12-01), Komiyama et al.

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