scholarly journals Optical characterization of strain sensing cables for Brillouin optical time domain analysis

2021 ◽  
Vol 255 ◽  
pp. 12011
Author(s):  
Filippo Bastianini ◽  
Francesco Falcetelli ◽  
Paweł Bocheński ◽  
Leonardo Rossi ◽  
Raffaella Di Sante ◽  
...  
Keyword(s):  
Strain Measurement ◽  
Measurement Accuracy ◽  
Time Domain Analysis ◽  
Optical Characterization ◽  
Strain Sensing ◽  
Strain Transfer ◽  
Optical Time ◽  
Improved Design ◽  
Improved Strain

Two innovative optical fibre cable layouts designed to improve BOTDA strain measurement accuracy through improved strain transfer efficiency are presented, discussed and tested through experiments, analytical and numerical modelling. The second improved design presents good features to minimize the mismatch between measured and actual strain.

Distributed strain sensing for structural monitoring applications

2000 ◽  
Vol 27 (5) ◽  
pp. 873-879 ◽  
Author(s):  
Michael DeMerchant ◽  
Anthony Brown ◽  
Jeff Smith ◽  
Xiaoyi Bao ◽  
Theodore Bremner
Keyword(s):  
Strain Measurement ◽  
Measurement Accuracy ◽  
Brillouin Scattering ◽  
Strain Sensor ◽  
Structural Monitoring ◽  
Strain Sensing ◽  
Fibre Optics ◽  
Laboratory Test Results ◽  
The University ◽  
Distributed Strain

Strain sensors are a valuable tool for assessing the health of structures. The University of New Brunswick, in conjunction with ISIS Canada, is developing a distributed fibre optic strain sensor based on Brillouin scattering. This sensor can provide a virtually unlimited number of measurement points using a single optical fibre. A description of the operating principles of the system is given, along with a summary of laboratory test results. Strain measurement accuracy as high as approximately ±11 µε has been demonstrated at 1 m spatial resolution. Spatial resolutions as short as 100 mm can be used, although with decreased strain measurement accuracy. Future development of the technology will include an enhancement allowing both strain and temperature to be measured simultaneously.Key words: strain sensor, fibre optics, distributed sensing, structural monitoring, Brillouin scattering.

scholarly journals Characterization of evolution of mode coupling in a graded-index polymer optical fiber by using Brillouin optical time-domain analysis

2014 ◽  
Vol 22 (22) ◽  
pp. 26510 ◽  
Author(s):  
Yongkang Dong ◽  
Pengbai Xu ◽  
Hongying Zhang ◽  
Zhiwei Lu ◽  
Liang Chen ◽  
...  
Keyword(s):  
Optical Fiber ◽  
Time Domain ◽  
Mode Coupling ◽  
Time Domain Analysis ◽  
Domain Analysis ◽  
Polymer Optical Fiber ◽  
Graded Index ◽  
Optical Time
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