Method and device for reducing laser phase noise
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United States of America Patent
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Jun 28, 2011
Grant Date -
Mar 4, 2010
app pub date -
Oct 12, 2006
filing date -
Oct 13, 2005
priority date (Note) -
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Abstract
The present invention relates to a method and device for reducing the phase noise of a laser signal from a laser source. This device comprises a first current generator for supplying a driving current to the laser source in view of producing the laser signal. A phase noise detector is responsive to the laser wavelength for generating a phase error signal and a second current generator is responsive to the phase error signal for generating a compensation current added to the driving current supplied to the laser source for generating a phase-adjusted laser signal. The device therefore defines a phase stabilization loop formed by the phase noise detector and the second current generator, for reducing the phase noise of the laser signal.
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