Optical fiber sensor based on retro-reflective fiber Bragg gratings
US7379643B2 · kind B2 · utility
8Cited by
2References
16Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 5, 2005 |
| Grant date | May 27, 2008 |
| Priority date | — |
| Expiry date | Oct 5, 2025 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B6/021
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A retro-reflective sensor for sensing mechanical, chemical or temperature related information, is disclosed. The sensor is formed of an optical waveguide suitable for use in-situ in a high temperature environment having a Bragg grating written into a core region thereof with short-pulsed electromagnetic radiation, said optical waveguide having a glass transition temperature substantially higher than that of silica. Preferably the sensor is written into a length of sapphire fiber or within a zirconium waveguide. Preferably the pulse duration of the short pulsed electromagnetic radiation is less than 500 picoseconds.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.