Optical signal source wavelength stabilization system and method
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United States of America Patent
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Issued Date -
Jan 4, 2007
app pub date -
Dec 29, 2005
filing date -
Jun 30, 2005
priority date (Note) -
Abandoned
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Abstract
Apparatus for stabilizing wavelength of an optical signal output from an optical signal source comprises an optical fiber arranged to receive an optical signal from the optical signal source and an optical tap arranged to couple a control signal out of the optical fiber. An optical signal splitter is arranged to divide the control portion into a first portion having a wavelength-dependent intensity I.sub.1 and a second portion having a wavelength-dependent intensity I.sub.2. A control circuit is arranged to compute a ratio R=I.sub.1/I.sub.2 and to send an error signal to the optical signal source if wavelength drift in the optical signal source causes the ratio R to deviate from a predetermined set point.
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