Optical fiber lasers and amplifiers
US4815079A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 17, 1987 |
| Grant date | Mar 21, 1989 |
| Priority date | — |
| Expiry date | Dec 17, 2007 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01S3/094069
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
Apparatus for coupling radiation into a single-mode core of an optical fiber laser has a single-mode core disposed within a relatively large, multimode cladding at a location which is displaced from the center of the cross-section of the cladding. The cladding is surrounded by a further layer to prevent radiation from propagating out of the cladding. In addition, the apparatus preferably has slight bends to enhance the coupling of radiation from the cladding into the single-mode core. A further embodiment has a single-mode fiber laser disposed in a relatively large, multimode, slab cladding which, in turn, is surrounded by another cladding to prevent radiation from propagating out of the large cladding.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.