Optical amplifiers with dispersion compensation
US6417961B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 4, 2000 |
| Grant date | Jul 9, 2002 |
| Priority date | — |
| Expiry date | Dec 29, 2020 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01S3/10023
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
Optical amplifiers are provided that have dispersion-compensating fiber that is pumped with an optical source to produce Raman gain. Removable modules of dispersion-compensating fiber, which may be separate from the Raman-pumped dispersion-compensating fiber, may be used to adjust the amount of dispersion compensation provided by a given amplifier. The Raman pump may be formed using fiber-Bragg-grating-stabilized diode lasers or other suitable pump sources. Two cross-polarized diode lasers may be used for the Raman pump to reduce the dependence of the Raman gain on the polarization of the pump. If desired, the dispersion-compensating fiber may be Raman pumped using a two-pass configuration in which pump light reflects off of a reflector to produce additional gain. The reflector may be a Faraday rotator to minimize polarization-dependent pump effects.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.