Fiber laser device
US11901690B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 21, 2020 |
| Grant date | Feb 13, 2024 |
| Priority date | — |
| Expiry date | Apr 7, 2041 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01S3/09408
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A fiber laser device includes a pumping light source, an amplifying fiber, an input side fiber fusion-spliced on an input side of the amplifying fiber and formed with a HR-FBG, an output side fiber fusion-spliced on an output side of the amplifying fiber and formed with an OC-FBG having a reflectivity smaller than that of the HR-FBG, an output end, and a mode filter, wherein the input side fiber or an intermediate fiber disposed between the amplifying fiber and the input side fiber is fusion-spliced with the amplifying fiber via a fusion splice portion, and at least a portion of the mode filter is disposed in a region between the fusion splice portion and a position separated from the fusion splice portion by a coherence length of beating caused by mode interference of signal light propagating in the amplifying fiber.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.