Polarization sensitive photodetectors and detector arrays
US5767507A · kind A · utility
57Cited by
7References
29Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 15, 1996 |
| Grant date | Jun 16, 1998 |
| Priority date | — |
| Expiry date | Jul 15, 2016 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH10F39/80
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A device for detecting polarization of light comprising a first photodetector tuned to absorb TE polarization, a second photodetector tuned to absorb TM polarization, and a circuit for comparing an output from the first and second photodetector for generating a polarization output. The first photodetector comprises a first reflector, an absorption layer on top of the first reflector, and a second reflector on top of the absorption layer. The second photodetector comprises a third reflector on top of an absorption layer, and a fourth reflector disposed under absorption layer.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.