Optical switch including two integrated multiphase SLM's and a wave-plate the wave-plate providing an optical retardance of (2n+1)λ/4
US6954252B1 · kind B1 · utility
22Cited by
8References
5Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 4, 2000 |
| Grant date | Oct 11, 2005 |
| Priority date | — |
| Expiry date | Nov 4, 2020 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04Q2213/1319
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
An optical switch uses a polarization insensitive spatial light modulator operating by a double pass through a liquid crystal cell. The switch includes two such modulators in a cross bar arrangement. Different embodiments employing techniques for reducing cross talk are described.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.