Environmental characteristic measurement device and environmental characteristic measurement method
US11385082B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 26, 2019 |
| Grant date | Jul 12, 2022 |
| Priority date | — |
| Expiry date | Mar 26, 2039 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01D5/35364
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An environmental property measurement apparatus includes a unit configured to receive probe light in a desired mode from one end of a measurement optical fiber, a unit configured to receive, from the other end of the measurement optical fiber, a light pulse in the desired mode as a pump light pulse with respect to the probe light, the light pulse having a frequency difference corresponding to a Brillouin frequency shift of the measurement optical fiber relative to the probe light on a high frequency side, and a unit configured to receive second probe light having the frequency difference corresponding to the Brillouin frequency shift of the measurement optical fiber relative to the probe light on a low frequency side from the other end of the measurement optical fiber, the second probe light being probe light with respect to the probe light in another mode different from the desired mode.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.