Illuminated and non-illuminated photodiodes for monitoring and controlling AC and DC components of a laser beam
US7045752B2 · kind B2 · utility
9Cited by
1References
17Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 30, 2003 |
| Grant date | May 16, 2006 |
| Priority date | — |
| Expiry date | Mar 9, 2024 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01J1/4257
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Embodiments of the present invention utilize two photodiodes on the same substrate, one illuminated monitor photodiode to monitor an optical beam out of a back facet (or back scattered) of a laser, and one non-illuminated reference photodiode to characterize in real time radio frequency (RF) parameters/performance to control extinction ratio and optical modulation amplitude of the laser beam.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.