Correlation-based continuous-wave technique for optical fiber distributed strain measurement using Brillouin scattering (Invited Paper)

2005 ◽  
Author(s):  
Kazuo Hotate
Keyword(s):  
Optical Fiber ◽  
Strain Measurement ◽  
Continuous Wave ◽  
Brillouin Scattering ◽  
Wave Technique ◽  
Distributed 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.

Multiplexing of optical fiber gas sensors with a frequency-modulated continuous-wave technique

2001 ◽  
Vol 40 (7) ◽  
pp. 1011 ◽  
Author(s):  
H. B. Yu ◽  
W. Jin ◽  
H. L. Ho ◽  
K. C. Chan ◽  
C. C. Chan ◽  
...  
Keyword(s):  
Optical Fiber ◽  
Gas Sensors ◽  
Continuous Wave ◽  
Wave Technique
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