Semiconductor laser drive device

Details Semiconductor laser drive device Semiconductor laser drive device

1990-09-06

1991-05-21

Gonzalez, Frank

Coherent light generators

Particular beam control device

Having particular beam control circuit component

372 31, 372 33, 372 34, 372 38, H01S 3131

Patent

active

050181548

ABSTRACT:
A semiconductor laser drive device modulates optical output of a semiconductor laser in accordance with an externally provided modulation signal comprises a compensation circuit for calculating a compensation coefficient and for generating a compensation modulation signal, a threshold value current generation circuit for generating and a threshold value current to the compensation modulation signal and sending the added current as a drive current, and a current drive circuit for driving the semiconductor laser based on the drive current sent from the threshold value current generation circuit. In accordance with the semiconductor laser, the optical output error caused by the temperature change of the semiconductor laser is compensated.

REFERENCES:
patent: 4796266 (1989-01-01), Banwell et al.
patent: 4817098 (1989-03-01), Horikawa
patent: 4819241 (1989-04-01), Nagano
patent: 4884279 (1989-11-01), Odagiri

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