Amplifier having pump fiber filter
US5363234A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Oct 14, 1993 |
| Grant date | Nov 8, 1994 |
| Priority date | — |
| Expiry date | Oct 14, 2013 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01S2301/02
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
Disclosed is a fiber amplifier including a gain fiber and a source of pump power having a wavelength .lambda..sub.p coupled to one end thereof. A signal of wavelength .lambda..sub.s is introduced into a first end of the gain fiber, and an amplified signal of wavelength .lambda..sub.s is coupled from the second end thereof. The signal can traverse an undesired secondary path as well as a preferred primary path to the amplifier output. To prevent light of wavelength .lambda..sub.s from traversing the secondary path and thus increasing the amplifier noise figure, the amplifier includes attenuating fiber means for attenuating that portion of the signal of wavelength .lambda..sub.s that propagates in the secondary path.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.