Optical fiber for Raman amplification, optical fiber coil, Raman amplifier, and optical communication system
US7440167B2 · kind B2 · utility
18Cited by
1References
12Claims
0Family size
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Key dates
| Filing date | Jun 22, 2007 |
| Grant date | Oct 21, 2008 |
| Priority date | — |
| Expiry date | Jun 22, 2027 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01S3/06775
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
An optical fiber for Raman amplification amplifies a signal light with a pumping light. A chromatic dispersion at a wavelength of 1,550 nm is in a range between −70 ps/nm/km and −30 ps/nm/km. Raman gain efficiency with a pumping light of 1,450 nm is equal to or more than 5 (W×km)−1. Nonlinear coefficient at the wavelength of 1,550 nm is equal to or less than 5.0×10−9 W−1. Zero-dispersion wavelength is neither at a wavelength of the signal light nor at a wavelength of the pumping light. Cut-off wavelength is equal to or less than the wavelength of the pumping light.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.