Polarization independent optical directional coupler wavelength tunable filters/receivers
US5502783A · kind A · utility
32Cited by
3References
34Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Aug 18, 1994 |
| Grant date | Mar 26, 1996 |
| Priority date | — |
| Expiry date | Aug 18, 2014 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02F2203/06
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A polarization independent tunable filter/receiver for optical communications. The tunable filter, operating as a directional coupler, has three waveguides including a central, feedguide and a pair of branch waveguides. Through either electro-optic effects or free carrier injection, the TM and TE polarization modes of the central wavelength can be coupled from the feedguide to the appropriate branch guide. The separated modes can be either detected independently or reunited in phase for further processing.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.