AWG filter for wavelength interrogator
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United States of America Patent
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Mar 17, 2015
Grant Date -
Sep 18, 2014
app pub date -
Mar 14, 2013
filing date -
Mar 14, 2013
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Abstract
A wavelength interrogator is coupled to a circulator which couples optical energy from a broadband source to an optical fiber having a plurality of sensors, each sensor reflecting optical energy at a unique wavelength and directing the reflected optical energy to an AWG. The AWG has a detector coupled to each output, and the reflected optical energy from each grating is coupled to the skirt edge response of the AWG such that the adjacent channel responses form a complementary pair response. The complementary pair response is used to convert an AWG skirt response to a wavelength.
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