Semiconductor laser device with light emission inhibiting means

Details Semiconductor laser device with light emission inhibiting means Semiconductor laser device with light emission inhibiting means

1987-05-26

1989-06-06

Davie, James W.

Coherent light generators

Particular beam control device

Having particular beam control circuit component

372 31, H01S 310

Patent

active

048377872

ABSTRACT:
A seimconductor laser device wherein the quantity of light emitted from a semiconductor laser is monitored by a light quantity monitor circuit, and the output of the monitor circuit is compared by a comparator circuit with a reference voltage. An emission inhibiting device inhibits the semiconductor laser from emitting light in accordance with the output of the comparator circuit. The emission inhibiting device is arranged to inhibit the supply of an optical modulation signal to the semiconductor laser, or it comprises a current source for driving the semiconductor laser, the output of the current source being reduced when the emission of light from the laser is to be inhibited.

REFERENCES:
patent: 4592057 (1986-05-01), Comerford
patent: 4612671 (1986-09-01), Giles
patent: 4618958 (1986-10-01), Shibata et al.

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