Holographic pump coupler and laser grating reflector
US7542639B2 · kind B2 · utility
10Cited by
5References
22Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 29, 2005 |
| Grant date | Jun 2, 2009 |
| Priority date | — |
| Expiry date | Mar 29, 2025 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01S3/094003
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
In the present invention, a volume holographic optical element is used as a pump coupler. The holographic coupler allows at least one pump wavelength to be coupled into the laser medium. The direction of the pump beam onto the coupler is not co-linear with the direction of the signal beam out of the coupler. The invention further provides the coupling of more than one pump wavelengths using a single holographic coupler element while maintaining the high isolation between pump and signal beam. The invention further provides a narrow-band reflection grating of various efficiencies for the signal beam (as part of the laser cavity).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.