Continuous temperature compensation for a laser modulation...

Coherent light generators – Particular beam control device – Modulation

Reexamination Certificate

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C372S034000, C372S038070

Reexamination Certificate

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07324570

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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