WDM-channel equalizer
US6452718B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Oct 1, 1999 |
| Grant date | Sep 17, 2002 |
| Priority date | — |
| Expiry date | Oct 1, 2019 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04B2210/258
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
The present invention relates to an arrangement and a method relating to optical channel equalizers. The channel equalizer includes at least one Q-port direction-dependent router (40), where Q≧3, one N-channel WDM (de)multiplexer (30), where N≧2, N-number of amplifying waveguides (31, 32, 33, 34, 35, 36, 37 and 38), at least N-number of fiber amplifiers (51, 52, 53, 54, 55, 56, 57 and 58), at least N-number of Bragg gratings (61, 62, 63, 64, 65, 66, 67 and 68), at least N-number of variable optical pump laser attenuators (71, 72, 73, 74, 75, 76, 77 and 78), at least one optical splitter (20 and 22) and at least one pump laser (10, 12, 14 and 16) per optical splitter (20 and 22). At least one of the ports (42, 44 and 46) on the direction-dependent router (40) is disposed on a first side of the WDM (de)multiplexer (30). Each amplifying waveguide (31, 32, 33, 34, 35, 36, 37 and 38) includes at least one fiber amplifier (51, 52, 53, 54, 55, 56, 57 and 58) and at least one Bragg grating (61, 62, 63, 64, 65, 66, 67 and 68). At least one fiber amplifier (51, 52, 53, 54, 55, 56, 57 and 58) is disposed between a Bragg grating (61, 62, 63, 64, 65, 66, 67 and 68) and the WDM (de)multipl…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.