US Patent 7016047 Active Q-point stabilization for linear interferometric sensors
Patent 7016047 was granted and assigned to Prime Photonics Lc on March, 2006 by the United States Patent and Trademark Office.
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A linear interferometric sensor system in which the light output from the interferometric sensor is optically bandpass filtered before conversion to an electrical signal by an adjustable band-pass filtering device and the center wavelength of the adjustable band-pass filtering device is controlled by a feedback circuit responsive to the steady state component of the electrical signal corresponding to the filtered sensor return. In a preferred embodiment, the adjustable band-pass filtering device is an electrically tunable optical filter. The invention is particularly useful in self calibrating interferometric/intensity-based sensor configuration, but can be used with other linear interferometric sensor configurations.
US Patent 7016047 Active Q-point stabilization for linear interferometric sensors
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