Method for making continuously chirped fiber bragg gratings
US5718738A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Nov 4, 1996 |
| Grant date | Feb 17, 1998 |
| Priority date | — |
| Expiry date | Nov 4, 2016 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B6/02085
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
In accordance with the invention, a continuously chirped fiber Bragg grating is made by fabricating a continuously chirped phase mask and using the mask to write a Bragg grating on a parallel fiber. The chirped phase mask is made by exposing a photoresist-coated mask substrate to two interfering beams: one a collimated beam and the other a beam reflected from a continuously curved mirror. After etching, the resulting phase mask can be used to write a chirped fiber grating having a continuously varying grating period without physical modification of the fiber. The resulting fiber grating has a widened bandwidth and uniform dispersive delay characteristics useful for dispersion compensation in critical telecommunications applications.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.