Microphotonic polarization independent acousto optical tunable filter and receiver
US5611004A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jan 30, 1996 |
| Grant date | Mar 11, 1997 |
| Priority date | — |
| Expiry date | Jan 30, 2016 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02F1/125
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A polarization independent acousto-optical tunable filter (AOTF). The AOTF is fabricate with two waveguides formed on a single substrate. An incoming polarization independent beam of light is split into TE and TM optical components with a walk-off crystal wherein each optical component is coupled into a different one of the two waveguides. The AOTF can be formed to provide two stages of filtering. The two stages of filtering can be realized be providing two successive stages or by passing the optical signal through the same filter twice. Various configurations are obtained by placing TM and TE polarizers within the optical path traveled by the incoming beam of light.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.