Optical fiber filter for suppression of amplified spontaneous emission
US7272287B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 11, 2005 |
| Grant date | Sep 18, 2007 |
| Priority date | — |
| Expiry date | May 11, 2025 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B6/105
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
An in-line, distributed optical fiber filter comprises a core region with a raised refractive index (with respect to the surrounding cladding material) so as to allow for total internal reflection (TIR) of the desired transmission wavelength(s). One or more raised index features are formed within the cladding region and are configured so as to result in mode mixing between the cladding mode and core mode at determined wavelength(s) to be removed by filtering. The parameters associated with determining the proper core specifications and cladding specifications can be separately determined to provide for enhanced performance in terms of both filtering unwanted signals and propagation of desired communication signals.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.