Erbium-doped fiber amplifier and an optical fiber communication system
US5623362A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 5, 1996 |
| Grant date | Apr 22, 1997 |
| Priority date | — |
| Expiry date | Aug 5, 2016 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01S3/094096
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
The erbium-doped fiber amplifier comprises: a first erbium-doped optical fiber pumped by 0.98 .mu.m band light and amplifying the signal light; a first pump light source for producing the 0.98 .mu.m band light; a first optical coupler for coupling the 0.98 .mu.m band light with the signal light at an input portion of the first optical fiber; a second erbium-doped optical fiber pumped by 1.48 .mu.m band light and amplifying the signal light; a second pump light source for producing the 1.48 .mu.m band light; and a second optical coupler for coupling the 1.48 .mu.m band light with the signal light at an output portion of the second optical fiber; wherein a pump light isolator is installed between the first optical fiber and the second optical fiber for blocking the passing of the 1.48 .mu.m band light from the second optical fiber to the first optical fiber while allowing the passing of the signal light.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.