scholarly journals Study on the simultaneous distributed measurement of temperature and strain based on Brillouin scattering in dispersion-shifted fiber

OSA Continuum ◽  
2020 ◽  
Vol 3 (8) ◽  
pp. 2078 ◽  
Author(s):  
Liwen Sheng ◽  
Ligong Li ◽  
Lei Liu ◽  
Leijun Hu ◽  
Ming Yuan ◽  
...  
Keyword(s):  
Brillouin Scattering ◽  
Distributed Measurement

scholarly journals Distributed Fiberoptic Sensor for Simultaneous Temperature and Strain Monitoring Based on Brillouin Scattering Effect in Polyimide-Coated Fibers

2020 ◽  
Vol 2020 ◽  
pp. 1-5
Author(s):  
Liwen Sheng ◽  
Ligong Li ◽  
Leijun Hu ◽  
Ming Yuan ◽  
Jinpeng Lang ◽  
...  
Keyword(s):  
Optical Fiber ◽  
Brillouin Scattering ◽  
Optical Fiber Sensor ◽  
Frequency Shifts ◽  
Strain Monitoring ◽  
Excellent Candidate ◽  
Sensitivity Problem ◽  
Distributed Measurement ◽  
Two Peaks ◽  
Fiberoptic Sensor

A unique multiparameter sensor for distributed measurement of temperature and strain based on spontaneous Brillouin scattering in polyimide-coated optical fiber is proposed, which is an excellent candidate for the cross-sensitivity problem in conventional Brillouin sensing network. In the experimental section, the discrimination of strain and temperature is successfully demonstrated by analysing the unequal sensing coefficients of the Brillouin frequency shifts generated by different acoustic modes. The Brillouin frequency shifts of the main two peaks are successfully measured to discriminate the strain and temperature with an accuracy 19.68 με and 1.02°C in 2.5 km sensing range. The proposed distributed Brillouin optical fiber sensor allows simultaneous measurement of temperature and strain, thus opening a door for practical application such as oil explorations.

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.

Simultaneous distributed measurement of strain and temperature from noise-initiated Brillouin scattering in optical fibers

1998 ◽  
Vol 34 (4) ◽  
pp. 645-659 ◽  
Author(s):  
T.R. Parker ◽  
M. Farhadiroushan ◽  
R. Feced ◽  
V.A. Handerek ◽  
A.J. Rogers
Keyword(s):  
Optical Fibers ◽  
Brillouin Scattering ◽  
Distributed Measurement
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