Technique for reducing polarization dependent gain in an amplified optical transmission system
US5345331A · kind A · utility
27Cited by
7References
13Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 13, 1993 |
| Grant date | Sep 6, 1994 |
| Priority date | — |
| Expiry date | Apr 13, 2013 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04B10/2933
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A technique employing a depolarized optical source to reduce the polarization dependent gain associated with the optical pump signal used to excite doped fiber amplifiers within an optical transmission system. Pumping the doped fiber amplifiers with a signal that has no single predominant linear SOP, equalizes the gain of the amplifiers. A particular embodiment of the invention includes a pump comprised of a passive polarization scrambler coupled to the output of a multifrequency optical laser. The simple, passive arrangement keeps overall system costs to a minimum and increases reliability.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.