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Heterodyne photomixer spectrometer with receiver photomixer driven at different frequency than source photomixer

United States Patent

8,482,739
July 9, 2013
View the Complete Patent at the US Patent & Trademark Office
Sandia National Laboratories - Visit the Intellectual Property Management and Licensing Website
A heterodyne photomixer spectrometer comprises a receiver photomixer that is driven at a different frequency than the source photomixer, thereby maintaining the coherent nature of the detection, eliminating etalon effects, and providing not only the amplitude but also the phase of the received signal. The heterodyne technique can be applied where the source and receiver elements are components of a waveguide thereby forming an on-chip heterodyne spectrometer.
Wanke; Michael C. (Albuquerque, NM), Fortier; Kevin (Albuquerque, NM), Shaner; Eric A. (Rio Rancho, NM), Barrick; Todd A. (Albuquerque, NM)
Sandia Corporation (Albuquerque, NM)
12/ 892,625
September 28, 2010
STATEMENT OF GOVERNMENT INTEREST This invention was made with Government support under contract no. DE-AC04-94AL85000 awarded by the U.S. Department of Energy to Sandia Corporation. The Government has certain rights in the invention.