Tunable laser fluid sensor
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United States of America Patent
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Dec 5, 2006
Issued Date -
N/A
app pub date -
Sep 28, 2004
filing date -
Sep 12, 2001
priority date (Note) -
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Abstract
A sensitive fluid sensor for detecting fluids and particularly trace fluids. The sensor may be adjustable for detecting fluids of various absorption lines. To effect such adjustment, a tunable laser may be used. The laser may be an edge emitting diode, a VCSEL or other tunable source. The detection apparatus of the sensor may incorporate a sample cell through which a laser light may go through. The sample cell may comprise a tunable ring-down cavity. The ring-down cavity may be a ring laser cavity like that of a ring laser gyroscope. There may be a photo detector proximate to the ring down cavity connected to a processor.
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