Spread spectrum dither for locking to transmission peak in tunable laser
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United States of America Patent
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Feb 3, 2004
Grant Date -
N/A
app pub date -
Dec 31, 2002
filing date -
Dec 31, 2002
priority date (Note) -
Expired
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Abstract
An apparatus including a cavity optical length actuator to vary a cavity optical path length of a laser in response to an excitation signal having varying frequencies. The cavity optical length actuator induces intensity perturbations in an optical beam of the laser corresponding to the excitation signal. A sensor senses the intensity perturbations in the optical beam and generates a response signal corresponding to the intensity perturbations. A combiner combines the excitation signal and the response signal to generate an error signal.
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