Brillouin gain spectrum distribution measurement method and equipment
US12388527B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 26, 2021 |
| Grant date | Aug 12, 2025 |
| Priority date | — |
| Expiry date | May 1, 2041 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01M11/00
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An object of the present invention is to provide a Brillouin gain spectrum distribution measuring method and apparatus capable of measuring a BGS, having a line width narrower than usual, in a distributed manner in the longitudinal direction of an optical fiber under test.This measuring apparatus prepares pump light in which a pulse is added to continuous light and probe light of continuous light in which a frequency is shifted from the pump light, makes the probe light incident on one end of the FUT and the pump light incident on the other end, and obtains a time waveform of a component amplified by the pump light pulse of a probe light intensity amplified by the pump light. This measuring apparatus changes an optical frequency difference between the pump light and the probe light, and obtains a time waveform for each optical frequency difference. This measuring apparatus obtains a BGS distribution of the FUT from these time waveforms.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.