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

Patent Number: 8,482,739
Issued: 7/9/2013
Official Filing: View the Complete Patent
Abstract: 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.
Filed: 9/28/2010
Application Number: 12/892,625
Government Interests: STATEMENT OF GOVERNMENT INTEREST This invention was made with Government support under Contract No. DE-NA0003525 awarded by the United States Department of Energy/National Nuclear Security Administration. The Government has certain rights in the invention.