Etalon and single longitudinal mode laser
US5933439A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 17, 1997 |
| Grant date | Aug 3, 1999 |
| Priority date | — |
| Expiry date | Jun 17, 2017 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01S3/109
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
An etalon is disposed in a resonator of a laser to make the laser oscillate in a single longitudinal mode. Opposite end faces of the etalon through which light travels are provided with coating by ion-assisted deposition to prevent output fluctuations of the laser due to changes in environmental moisture and/or aging of the laser. Preferably the coating is of HfO.sub.2 and SiO.sub.2. In accordance with a second aspect of the present invention, there is provided a single longitudinal mode laser comprising a resonator and an etalon which is disposed in the resonator to make the laser oscillate in a single longitudinal mode, wherein the improvement comprises that opposite end faces of the etalon through which light travels are provided with coating by ion-assisted deposition. Further, the resonator may be contained in an airtight casing.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.