Distributed fiber sensor
US10466207B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 29, 2016 |
| Grant date | Nov 5, 2019 |
| Priority date | — |
| Expiry date | Sep 26, 2036 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N29/34
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
In an embodiment, a sensor comprises a waveguide comprising a photoacoustic generation element disposed on the waveguide, the photoacoustic generation element comprising a photoabsorptive material; and a sensing element comprising an optical acoustic wave detector. In another embodiment, a sensing system comprises the sensor and a laser. In yet another embodiment, a method of sensing comprises providing the sensing system; heating the photoabsorptive material with a laser to generate an acoustic signal; sensing an intensity of laser light reflected by the optical acoustic wave detector to detect the acoustic signal; and determining a time of flight of the acoustic signal between the generation and the detection to determine a change in a parameter change in a medium between the photoabsorptive material and the optical acoustic wave detector.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.