Brillouin optical fiber sensing via optical chirp chain for ultrafast distributed measurement

2021 ◽  
Author(s):  
Henan Wang ◽  
Zongda Zhu ◽  
Dengwang Zhou ◽  
Dexin Ba ◽  
Yongkang Dong
Keyword(s):  
Optical Fiber ◽  
Fiber Sensing ◽  
Optical Fiber Sensing ◽  
Distributed Measurement

scholarly journals High-Performance Distributed Brillouin Optical Fiber Sensing

2021 ◽  
Vol 11 (1) ◽  
pp. 69-90
Author(s):  
Yongkang Dong
Keyword(s):  
Optical Fiber ◽  
High Performance ◽  
Brillouin Scattering ◽  
Stimulated Brillouin Scattering ◽  
Fiber Sensing ◽  
Optical Fiber Sensing ◽  
Dynamic Grating ◽  
Distributed Measurement ◽  
The Time Domain ◽  
Stimulated Brillouin

AbstractThis paper reviews the recent advances on the high-performance distributed Brillouin optical fiber sensing, which include the conventional distributed Brillouin optical fiber sensing based on backward stimulated Brillouin scattering and two other novel distributed sensing mechanisms based on Brillouin dynamic grating and forward stimulated Brillouin scattering, respectively. As for the conventional distributed Brillouin optical fiber sensing, the spatial resolution has been improved from meter to centimeter in the time-domain scheme and to millimeter in the correlation-domain scheme, respectively; the measurement time has been reduced from minute to millisecond and even to microsecond; the sensing range has reached more than 100 km. Brillouin dynamic grating can be used to measure the birefringence of a polarization-maintaining fiber, which has been explored to realize distributed measurement of temperature, strain, salinity, static pressure, and transverse pressure. More recently, forward stimulated Brillouin scattering has gained considerable interest because of its capacity to detect mechanical features of materials surrounding the optical fiber, and remarkable works using ingenious schemes have managed to realize distributed measurement, which opens a brand-new way to achieve position-resolved substance identification.

scholarly journals Recent Progress in Fast Distributed Brillouin Optical Fiber Sensing

2018 ◽  
Vol 8 (10) ◽  
pp. 1820 ◽  
Author(s):  
Hongying Zhang ◽  
Dengwang Zhou ◽  
Benzhang Wang ◽  
Chao Pang ◽  
Pengbai Xu ◽  
...  
Keyword(s):  
Optical Fiber ◽  
High Performance ◽  
Frequency Comb ◽  
Sampling Rate ◽  
Time Domain Analysis ◽  
Measurement Tool ◽  
Optical Frequency ◽  
Fiber Sensing ◽  
Optical Fiber Sensing ◽  
Distributed Measurement

Brillouin-based optical fiber sensing has been regarded as a good distributed measurement tool for the modern large geometrical structure and the industrial facilities because it can demodulate the distributed environment information (e.g., temperature and strain) along the sensing fiber. Brillouin optical time domain analysis (BOTDA), which is an excellent and attractive scheme, has been widely developed thanks to its high performance in a signal-to-noise ratio, a spatial resolution, and sensing distance. However, the sampling rate of the classical BOTDA is severely limited by several factors (especially the serially frequency-sweeping process) so that it cannot be suitable for the quickly distributed measurement. In this work, we summarize some promising breakthroughs about the fast BOTDA, which can be named as an optical frequency comb technique, an optical frequency-agile technique, a slope-assisted technique, and an optical chirp chain technique.

scholarly journals Fast Hotspot Detection in SFCLs by Exploiting Strain Response in Optical Fiber Sensing

2021 ◽  
pp. 1-1
Author(s):  
Arooj Akbar ◽  
Nicolo' Riva ◽  
Zhisheng Yang ◽  
Luc Thevenaz ◽  
Bertrand Dutoit
Keyword(s):  
Optical Fiber ◽  
Strain Response ◽  
Hotspot Detection ◽  
Fiber Sensing ◽  
Optical Fiber Sensing

An optical fiber sensing method for partial discharge in the HVDC cable system

2021 ◽  
Vol 128 ◽  
pp. 106749
Author(s):  
Zhiheng Liu ◽  
Yongqing Wang ◽  
Xiao Chen ◽  
Xiaokai Meng ◽  
Xiuling Liu ◽  
...  
Keyword(s):  
Optical Fiber ◽  
Partial Discharge ◽  
Cable System ◽  
Fiber Sensing ◽  
Optical Fiber Sensing
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