Transmission detection for vertical cavity surface emitting laser power monitor and system
US6452669B1 · kind B1 · utility
7Cited by
6References
38Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 12, 2000 |
| Grant date | Sep 17, 2002 |
| Priority date | — |
| Expiry date | Apr 12, 2020 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01S5/0264
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A power monitor for a light emitter uses an absorptive material placed in the path of the application beam. The absorptive has a measurable characteristics thereof altered by an intensity of the light beam, the absorptive material being thin enough to allow a portion of the light beam sufficient for a desired application to be passed to the desired application. Preferably, an anti-reflective coating is placed between the absorptive material and the light emitting device. The absorptive material may be formed directly on the light emitting device or may be formed on or integrated with a spacer.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.