Agile high sensitivity optical sensor
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United States of America Patent
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Issued Date -
Apr 21, 2005
app pub date -
Aug 27, 2004
filing date -
Aug 28, 2003
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
An agile optical sensor based on scanning optical interferometry is proposed. The preferred embodiment uses a retroreflective sensing design while another embodiment uses a transmissive sensing design. The basic invention uses wavelength tuning to enable an optical scanning beam and a wavelength dispersive element like a grating to act as a beam splitter and beam combiner to create the two beams required for interferometry. A compact and environmentally robust version of the sensor is an all-fiber in-line low noise delivery design using a fiber circulator, optical fiber, and fiber lens connected to a Grating-optic and reflective sensor chip.
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