Digital control of laser diode power levels

Details Digital control of laser diode power levels Digital control of laser diode power levels

1995-08-10

1996-11-26

Scott, Jr., Leon

Coherent light generators

Particular beam control device

Optical output stabilization

372 38, 372 28, 372 32, H01S 313

Patent

active

055793282

ABSTRACT:
A digital controller for an injection laser diode. The controller maintains the laser diode average and peak power levels constant in spite of temperature and/or aging effects. A pseudo-random sequence is superimposed on the `0` and/or `1` current levels to the laser diode and the optical output is detected by a back facet monitor. The detected signal is compared with preset references and a feedback signal is used to control both the bias current and the modulation current.

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patent: 5371755 (1994-12-01), Murata et al.
patent: 5506853 (1996-04-01), Tegge
"Laser Level Control for High Bit Rate Optical Fibre Systems", Smith et al, 13th Circuits and Systems International Symposium, Houston, Texas, Apr. 1980.

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