Amplification optical fiber and fiber laser device using the same
US9431787B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 11, 2015 |
| Grant date | Aug 30, 2016 |
| Priority date | — |
| Expiry date | Sep 11, 2035 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01S2301/20
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
The refractive index of the first core portion 11a is higher than that of a clad 12, and the refractive index of the second core portion 11b is higher than that of the first core portion 11a. When light of the LP01 mode and light of the LP11 mode are standardized by power, in the core 11, an active element that stimulates to emit light of the predetermined wavelength is doped at a higher concentration in at least a part of an area where power of light of the LP01 mode is larger than that of light of the LP11 mode than at least a part of an area where the power of light of the LP11 mode is larger than that of light of the LP01 mode.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.