Weak reflection terahertz fiber optic devices for distributed sensing applications
US9958605B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 1, 2015 |
| Grant date | May 1, 2018 |
| Priority date | — |
| Expiry date | Mar 16, 2036 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B6/29356
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
The present disclosure provides a novel fiber optic sensing device using ultra-weak, terahertz-range reflector structures. A fiber optic sensor device for distributed measurements (strain/temperature) includes an optical fiber detection arm having an inner core extending along a length of the optical fiber, an outer cladding surrounding the inner core, and at least one ultra-weak, terahertz-range reflector structure. Each reflector structure is comprised of two or more ultra-weak range reflectors (gratings) written at a spacing corresponding to the terahertz range and formed along a length of the inner core of the optical fiber. A narrow bandwidth, tunable laser interrogation system interrogates the optical fiber and measures changes in reflections and interference patterns caused by physical changes in the optical fiber.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.