Brillouin scattering measurement method and brillouin scattering measurement system
US10066973B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Oct 28, 2016 |
| Grant date | Sep 4, 2018 |
| Priority date | — |
| Expiry date | Mar 16, 2037 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01S5/12
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A Brillouin backscattered spectrum is obtained in such a way that two optical pulse pairs each composed of two pulses of different durations and of the same phase and Π phase difference are launched into a sensing optical fiber; Brillouin backscattered lights produced by the optical pulse pairs are detected into signals for the respective optical pulse pairs; the signals are sampled with two window functions whose time widths are equal to respective pulse durations of the optical pulse pair and whose delay time is variable; each sampled signal is transformed with a predetermined transformation; products of the transformed signals are calculated; and subtraction between the products is performed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.