Shorter wavelength photo-annealing apparatus for rare-earth-doped fiber and its optical assemblies under irradiation
US8578739B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 4, 2010 |
| Grant date | Nov 12, 2013 |
| Priority date | — |
| Expiry date | Dec 10, 2031 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01S3/1608
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
An optical fiber apparatus is suitable to operate under irradiation, more particularly to mitigating the damage of a rare-earth-doped optical fiber element as part of an optical fiber assembly causes by irradiation. The irradiation mitigation attributes to a photo-annealing apparatus including at least a shorter wavelength photo-annealing spectral content, which is relative to that of a pump light source, for effectively photo-annealing the rare-earth-doped fiber element. Photo-annealing by such shorter wavelength light results in a fast and nearly complete recovery of radiation induced attenuation of the rare-earth-doped optical fiber element in the wavelength range from 900 nm to 1700 nm.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.