Method and system for stabilizing operation of laser sources

Details Method and system for stabilizing operation of laser sources Method and system for stabilizing operation of laser sources

2006-10-26

2009-02-03

Nguyen, Dung T (Department: 2828)

Coherent light generators

Particular beam control device

Optical output stabilization

C372S038020, C372S038070

Reexamination Certificate

active

07486708

ABSTRACT:
A system for stabilizing an output optical power from a laser source against drifts induced by temperature and/or aging, said output optical power including a target optical-modulation amplitude around a target average value includes:a power sensor for sensing the output optical power from the laser source and generating a power sensing signal indicative thereof, anda controller sensitive to the power sensing signal and configured for selectively adjusting the bias (IB) and modulation (IM) currents of the laser source by: detecting an error between the actual average output optical power from the laser source and the target average value,comparing the error against a given error threshold, and when the error reaches the threshold adjusting the bias (IB) and modulation (IM) currents to bring the output optical power from the laser source (1) back to the target average value (Ptarget) and the target optical modulation amplitude (OMAtarget) around the target average value (Ptarget).

REFERENCES:
patent: 6907055 (2005-06-01), Morley et al.
patent: 2003/0007525 (2003-01-01), Chen
patent: 2005/0190804 (2005-09-01), Robinson et al.
patent: 2005/0286575 (2005-12-01), Hattori et al.
patent: 2006/0165139 (2006-07-01), Sanchez
patent: 2006/0189511 (2006-08-01), Koblish et al.

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