Optical fiber test method and optical fiber test device
US11719599B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 10, 2019 |
| Grant date | Aug 8, 2023 |
| Priority date | — |
| Expiry date | Oct 10, 2039 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01M11/39
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
This disclosure describes inputting pulsated pump light in a fundamental mode or a first higher-order mode into one end of an optical fiber under test constructed by connecting two optical fibers in series; inputting probe light having an optical frequency difference within a Brillouin frequency shift range with respect to the pump light into the other end of the optical fiber under test in the fundamental mode or the first higher-order mode; measuring a Brillouin gain distribution related to a distance of transmitted light intensity of probe light output from the one end into which the pump light was input; and calculating each inter-modal coupling efficiency at the connection point of the optical fiber under test.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.