Acousto-optic variable attenuator with active cancellation of back reflections
US6510261B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 4, 2000 |
| Grant date | Jan 21, 2003 |
| Priority date | — |
| Expiry date | Dec 4, 2020 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02F2201/02
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
An acousto-optic filter includes an optical fiber with a first region and a second region. A first acoustic wave generator is coupled to optical fiber. The first acoustic wave generator produces a first acoustic wave that travels in a first direction in the first region. A backward-propagating wave is generated in response to propagation of the first acoustic wave along the optical fiber. The backward-propagating wave travels in an opposite direction relative to the first acoustic wave. A first acoustic wave propagation member is coupled to the optical fiber. A second acoustic wave generator is coupled to the optical fiber at the second region. The second acoustic wave generator produces a second acoustic wave that combines with the backward propagating acoustic wave.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.