Four wave mixing reduction in raman amplifiers
US6597495B2 · kind B2 · utility
6Cited by
10References
19Claims
0Family size
Assignee
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Key dates
| Filing date | Oct 18, 2001 |
| Grant date | Jul 22, 2003 |
| Priority date | — |
| Expiry date | Oct 18, 2021 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01S2301/06
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
An improved method is provided for reducing four-wave mixing induced degradation in an optical data signal traversing an optical transport network that uses Raman amplifiers. The method includes: introducing at least two Raman amplifiers into the optical transport network, each Raman amplifier having a laser source, and synchronously modulating the laser sources of the Raman amplifiers, thereby reducing four-wave mixing in the optical data signal. Modulation of the laser sources is performed at such a rate that crosstalk from the modulation to the optical data signals experiencing the Raman gain is minimized.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.