Filter obtained by writing a Bragg grating into an optical fiber
US5818987A · kind A · utility
17Cited by
7References
2Claims
0Family size
Assignee
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Key dates
| Filing date | Feb 28, 1997 |
| Grant date | Oct 6, 1998 |
| Priority date | — |
| Expiry date | Feb 28, 2017 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B6/02047
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
An optical filter is formed by writing at least one long-period Bragg array into an optical fiber which is tapered to define two substantially adiabatic transition areas delimiting an intermediate area in which the long-period Bragg grating is written to produce codirectional coupling between two guided modes in the intermediate area at a wavelength that is a function of the period of the grating.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.