Semiconductor laser control apparatus

Details Semiconductor laser control apparatus Semiconductor laser control apparatus

1988-12-27

1989-08-08

Davie, James W.

Coherent light generators

Particular beam control device

Optical output stabilization

H01S 313

Patent

active

048560081

ABSTRACT:
A semiconductor laser control apparatus for controlling an intensity of light emitted from a semiconductor laser by controlling a drive current to by supplied to the semiconductor laser, includes a first circuit which roughly determines a first value of the drive current so as to obtain a intensity of light near a desired intensity of light emitted from the laser diode, a second circuit which precisely determines a second value of the drive current so as to obtain the desired intensity of light, after determining the first value of the drive current by the first circuit, and an adder which adds the first value of the drive current determined by the first circuit and the second value of the drive current determined by the second circuit. The drive current having an added value is supplied to the semiconductor laser.

REFERENCES:
patent: 4689795 (1987-08-01), Yoshimoto et al.
patent: 4745609 (1988-05-01), Yoshikawa

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