Optical grating
US5830622A · kind A · utility
93Cited by
6References
21Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 4, 1996 |
| Grant date | Nov 3, 1998 |
| Priority date | — |
| Expiry date | Oct 4, 2016 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S430/146
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
An optical grating is formed by exposing linearly spaced regions of an optical fibre (10), typically a germanosilicate core fibre, to UV irradiation to produce spaced apart regions (12 and 13) of differing refractive index within the core (11) of the fibre. The grating characteristics are modified to create a relatively complex structure, for example a pi- shifted distributed phase structure, by post-processing the grating. This is achieved by exposing at least one concomitant region (14) of the grating to localised UV irradiation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.