Optical filter control
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United States of America Patent
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Jul 30, 2013
Grant Date -
Dec 30, 2010
app pub date -
Dec 16, 2009
filing date -
Apr 13, 2009
priority date (Note) -
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status (Latency Note)
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Abstract
A system and method for controlling an optical filter is provided. The system and method includes dithering a delay of an optical path within an optical filter unit cell, measuring a position of a filter zero, measuring a position of a filter pole, or measuring positions of both a filter zero and a filter pole by observing an output of the unit cell when the delay is dithered, and using the measurement as feedback for maintaining the position of the filter zero at a desired position, maintaining the position of the filter pole at a desired position, or maintaining the positions of both the filter zero and the filter pole at desired positions.
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