Fiber Bragg grating optical filter with a constant group-delay response in its working band
US6381069B1 · kind B1 · utility
15Cited by
5References
3Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 15, 2000 |
| Grant date | Apr 30, 2002 |
| Priority date | — |
| Expiry date | Jun 15, 2020 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B6/29394
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
The invention relates to the field of optical fiber wavelength division multiplexed transmission, and more particularly to the field of narrow-band optical filters for dense multiplexing. The invention proposes a narrow-band optical filter with a group-delay response that is very flat in the working band, obtained by cascading two Bragg gratings having group delays that are linear as a function of wavelength in the working band, but with their gradients being of opposite signs. The present solution is easier and less costly to implement than the prior art solutions, and it should also offer higher performance.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.