Device for coupling radiation into or out of an optical fibre
US7720340B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 22, 2008 |
| Grant date | May 18, 2010 |
| Priority date | — |
| Expiry date | Dec 22, 2028 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01S3/094019
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A device for coupling multimode pump light and a laser signal into or out of a cladding-pumped fibre laser is disclosed, comprising an output optical fibre, a substantially un-tapered feed-through optical fibre, an annular waveguide having a tapered section, and a plurality of multimode pump fibres such that: the signal feed-through fibre is located within the annular waveguide; the signal feed-through fibre is fused into the annular waveguide in the tapered section so that the annular waveguide becomes an additional cladding layer of the feed-through fibre; the end of the feed-through fibre that is fused into the annular waveguide is optically coupled to the output optical fibre; the multimode pump fibres are optically coupled to the annular waveguide in the un-tapered section. Methods of forming the device are also disclosed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.