Two-stage gain equalizer
US7391973B1 · kind B1 · utility
4Cited by
755References
10Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 28, 2003 |
| Grant date | Jun 24, 2008 |
| Priority date | — |
| Expiry date | Mar 25, 2025 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02F2201/305
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
An apparatus for selectively adjusting power levels of component signals of a wavelength division multiplexed signal. The apparatus comprises a first filter and a second filter. The first filter modulates the component signals according to a static attenuation profile, thereby providing coarsely modulated component signals. The second filter is coupled to the first filter to receive the coarsely modulated component signals and to modulate the coarsely modulated component signals according to a dynamic attenuation profile, thereby providing finely modulated component signals.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.