Continuous temperature compensation for a laser modulation...

Details Continuous temperature compensation for a laser modulation... Continuous temperature compensation for a laser modulation...

2008-01-29

2008-01-29

Rodriguez, Armando (Department: 2828)

Coherent light generators

Particular beam control device

Modulation

C372S034000, C372S038070

Reexamination Certificate

active

11072179

ABSTRACT:
Systems and methods for continuously compensating a modulation current of a laser. A temperature compensation circuit has circuitry with a positive temperature coefficient connected with circuitry having a negative temperature coefficient. The temperature compensation circuit generates a temperature dependent reference current that is mirrored to a gain circuit. The gain circuit provides variable gain. The gain circuit also provides inputs that can be set to select a particular gain. The output of the gain circuit, which changes as temperature affects the reference current, is used to compensate the modulation current of the laser.

REFERENCES:
patent: 5043992 (1991-08-01), Royer et al.
U.S. Appl. No. 11/072,180, filed Mar. 4, 2005 entitled “Regulated Current Mirror.”

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