Method and apparatus for reduction of light intensity decay in optical pumping devices
US5457430A · kind A · utility
4Cited by
3References
39Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 10, 1994 |
| Grant date | Oct 10, 1995 |
| Priority date | — |
| Expiry date | Nov 10, 2014 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03L7/26
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
Optical pumping devices use light reflected from reflecting surfaces to provide a portion of the light incident on the photodetector. Conventional optical pumping devices experience a decay, over time, of the initial light intensity incident on the photodetector. The optical pumping device of the invention experiences reduced light intensity decay. The invention passivates the reflecting surfaces to eliminate tarnish and oxidation by pretarnishing the surfaces or covering the surfaces with a material whose reflectivity does not vary over time, such as gold.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.