Heterodyne photomixer spectrometer with receiver photomixer driven at different frequency than source photomixer
US8482739B1 · kind B1 · utility
2Cited by
1References
17Claims
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Key dates
| Filing date | Sep 28, 2010 |
| Grant date | Jul 9, 2013 |
| Priority date | — |
| Expiry date | Mar 13, 2032 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N21/3581
- WIPO fieldMeasurement
- WIPO sectorInstruments
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.