Absorbing filter in pump cavity for control of beam quality
US4894837A · kind A · utility
12Cited by
8References
37Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 18, 1988 |
| Grant date | Jan 16, 1990 |
| Priority date | — |
| Expiry date | Nov 18, 2008 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01S3/0407
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
In a laser apparatus which includes a laser medium exhibiting thermally induced optical distortions, and flash lamp mounted near the laser medium to provide laser pumping radiation, an absorbing filter is mounted between the flash lamp and the laser medium for absorbing radiation in the output spectrum of the lamp which exhibits a low fluorescence efficiency in the laser medium. By absorbing radiation with the low fluorescence efficiency in the laser medium, heat which develops in the laser medium can be limited to control the thermally induced optical distortions.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.