Optical pumping injection cavity for optically pumped devices
US6643305B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 9, 2001 |
| Grant date | Nov 4, 2003 |
| Priority date | — |
| Expiry date | Aug 4, 2021 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01S5/34306
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
An apparatus for receiving optical pump radiation having a wavelength &lgr;p and transmitting pump light to an active region. The apparatus includes a first and second reflector, each reflector being reflective at the wavelength &lgr;p, disposed on opposite sides of the active region, where the separation between the reflectors creates a cavity that is resonant at the pump wavelength &lgr;p. The separation distance is preferably about m&lgr;p/2n cos &thgr;, where n is the average index of refraction of the material having an active region, &thgr; is the angle that the pump beam transverses relative the normal of said reflectors, and m is any positive integer. The apparatus provides low cost, high power, optically pumped edge emitting and surface emitting lasers which can be operated at elevated temperatures or power levels. The apparatus further provides mid-IR, high power optically pumped semiconductor lasers with high pump absorbance, long pump wavelength, and a thin active layer.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.