Fixing method for narrow bandwidth volume holograms in photorefractive materials
US5335098A · kind A · utility
55Cited by
47References
33Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 23, 1992 |
| Grant date | Aug 2, 1994 |
| Priority date | — |
| Expiry date | Oct 23, 2012 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03H2001/0439
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
An improved method for storing permanent holographic gratings in photorefractive materials for use in narrow band filters such as the H.sub.60 filter, as well as the filters themselves. The invention also provides an improved method of controlling the electric field and the nature of the photorefraction to minimize wavelength shifts and band broadening at a minimal reduction of diffraction efficiency.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.