Photoacoustic gas detector
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United States of America Patent
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Jan 29, 2013
Grant Date -
Apr 21, 2011
app pub date -
Oct 21, 2010
filing date -
Oct 21, 2009
priority date (Note) -
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Abstract
A photoacoustic detection device including a nanophotonic circuit including a plurality of semiconductor lasers capable of emitting a different frequencies; input couplers connected to optical waveguides; a multiplexer; an output optical waveguide, emerging into a recess; a tuning fork having its free arms arranged at the output of the output optical waveguide; and means for detecting the vibration of the tuning fork, all these elements being assembled in a monolithic component.
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