Method of making stable optical devices employing radiation-induced index changes
US5620496A · kind A · utility
23Cited by
7References
5Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 4, 1995 |
| Grant date | Apr 15, 1997 |
| Priority date | — |
| Expiry date | Dec 4, 2015 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B2006/12169
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
The present invention is predicated upon the discovery by applicants of a relationship describing thermal decay of radiation-induced index changes and a mechanism which permits stabilization by accelerated aging. Specifically, the induced index change decays in proportion to 1/(1+At.sup..alpha.) where A and .alpha. are functions of temperature, and the decay can be accelerated by heat treatment. As a consequence, the extent of decay can be determined for arbitrary time and temperature and, significantly, an appropriate heat treatment can be scheduled for making a device stable within predeterminable limits.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.