Amorphous copolymers for photorefractive compounds used in optical signal processing
US5198514A · kind A · utility
3Cited by
1References
2Claims
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Key dates
| Filing date | Jul 23, 1991 |
| Grant date | Mar 30, 1993 |
| Priority date | — |
| Expiry date | Jul 23, 2011 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02F1/3617
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
The invention is a series of amorphous copolymers which, used in association with a small molecule, provide photorefractive materials that can be used in optical signal processing. These copolymers contain an active non-linear optical group and a group which contributes to their photoconductivity. ##STR1## where: X is H, CH.sub.3, Cl or F PA0 Y is H, CH.sub.3, Cl or F PA0 2.ltoreq.n.ltoreq.4 PA0 2.ltoreq.m.ltoreq.4 PA0 The electron-donor group D being:--O--, --S--, ##STR2## or --COO-- The electron-acceptor group A.sub.e being: --CN, --NO.sub.2, ##STR3##
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.