发明名称 |
METHOD AND SYSTEM FOR AN ULTIMATELY FAST FREQUENCY-SCANNING BRILLOUIN OPTICAL TIME DOMAIN ANALYZER |
摘要 |
A method and a system for ultimately fast frequency-scanning Brillouin optical time domain analysis are provided herein. The method may include: simultaneously launching two pairs each having a pulsed pump wave and a counter-propagating constant wave (CW) probe wave, into an optical fiber, wherein the pulsed pumps have orthogonal States of Polarization (SOPs), and wherein the two CW probe waves have a same SOP; scanning common pump-probe frequency difference, over a frequency range that encompasses a respective Brillouin Gain Spectrum (BGS) and current and expected spectral shifts of the BGS along the optical fiber; deriving, a local Brillouin Frequency Shift (BFS), in a distributed manner along the optical fiber, which is defined as the pump-probe frequency difference which maximizes the Brillouin gain on the BGS; and determining strain and/or temperature in a distributed manner along the optical fiber, based on the respective local BFS. |
申请公布号 |
US2016273998(A1) |
申请公布日期 |
2016.09.22 |
申请号 |
US201615077264 |
申请日期 |
2016.03.22 |
申请人 |
Ramot at Tel-Aviv University Ltd. |
发明人 |
TUR Moshe;SOVRAN Ido;MOTIL Avi |
分类号 |
G01M11/00 |
主分类号 |
G01M11/00 |
代理机构 |
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代理人 |
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主权项 |
1. A method for ultimately fast frequency-scanning Brillouin optical time domain analysis comprising:
simultaneously launching two pairs of optical signals into an optical fiber, each pair comprising a pulsed pump wave and a counter-propagating constant wave (CW) probe wave, wherein the pulsed pumps have orthogonal States of Polarization (SOPs), and wherein the two CW probe waves have a same SOP; scanning common pump-probe frequency difference, over a frequency range that encompasses a respective Brillouin Gain Spectrum (BGS) and current and expected spectral shifts of the BGS along the optical fiber; deriving, a local Brillouin Frequency Shift (BFS), in a distributed manner along the optical fiber, wherein said local BFS is the pump-probe frequency difference which maximizes the Brillouin gain on the BGS; and determining strain and/or temperature in a distributed manner along the optical fiber, based on the respective local BFS. |
地址 |
Tel Aviv IL |