Optics: measuring and testing – By light interference – Spectroscopy
Reexamination Certificate
2002-10-09
2008-11-11
Connolly, Patrick J. (Department: 2877)
Optics: measuring and testing
By light interference
Spectroscopy
C372S009000, C372S032000, C372S092000, C356S437000
Reexamination Certificate
active
07450240
ABSTRACT:
A device of detection of gas in trace amounts by a semiconductor laser coupled to a resonant optical cavity containing a chemical species to be analyzed. The device comprises a resonant optical cavity containing a chemical species to be analyzed; a semiconductor laser, coupled by optical feedback to the optical cavity and capable of being frequency-scanned; a means for adjusting the laser-cavity coupling rate; a means for finely adjusting the optical feedback phase; and a means for measuring the light transmitted by the cavity.
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Morville, Kassi, Chenevier, and Romanini; Fast, low-noise, mode-by-mode, cavity-enhanced absorption spectroscopy by diode-laser self-locking; Appl. Phys. B 80, 1027-1038 (2005).
Chenevier Marc
Morville Jérôme
Romanini Daniele
Connolly Patrick J.
Duane Morris LLP
Richey Scott M.
Universite Joseph Fourier
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