Tracking modulation limiter for lasers

Details Tracking modulation limiter for lasers Tracking modulation limiter for lasers

1987-12-07

1988-07-12

Scott, Jr., Leon

Coherent light generators

Particular beam control device

Modulation

372 38, 372 46, 372 33, H01S 310

Patent

active

047575085

ABSTRACT:
A tracking modulation limiter for laser diodes tracks from the output of a laser diode the maximum forward current. The maximum forward current is multiplied by a factor less than one to generate a control current representative of the maximum negative modulation for the laser diode. The control current is modulated by an input modulation signal and combined with the maximum forward current to drive the laser diode so that the drive current does not fall below threshold.

REFERENCES:
patent: 4243951 (1981-01-01), Wolkstein et al.
patent: 4399418 (1983-08-01), Forrester
patent: 4611325 (1986-09-01), Fujito et al.
patent: 4625315 (1986-11-01), Lemberger et al.

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