Semiconductor laser control device

Details Semiconductor laser control device Semiconductor laser control device

1991-03-01

1992-08-11

Davie, James W.

Coherent light generators

Particular component circuitry

Optical pumping

H01S 310

Patent

active

051386232

ABSTRACT:
A semiconductor laser control device that comprises a light receiving photodiode for detecting light emitted from a semiconductor laser element to be controlled and a current amplifier circuit. To the amplifier circuit, the light receiving photodiode and a light emitting command signal are connected so as to apply first forward current to the laser element in response to difference between the light detection signal and an input signal corresponding to the light emitting command signal so that a negative feed back circuit is constituted from the light receiving photodiode and the amplifier circuit. The device further comprises a current applying circuit for applying second forward current to the laser element in conjunction with said first forward current and a correction circuit for correcting the second forward current.

REFERENCES:
patent: 4985896 (1991-01-01), Kimizuka et al.

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