Distributed Strain Measurement with Millimeter-Order Spatial Resolution Based on Brillouin Optical Correlation Domain Analysis and Beat Lock-in Detection Scheme

2006 ◽  
Author(s):  
Kwang-Yong Song ◽  
Zuyuan He ◽  
Kazuo Hotate
Keyword(s):  
Spatial Resolution ◽  
Strain Measurement ◽  
Domain Analysis ◽  
Optical Correlation ◽  
Detection Scheme ◽  
Lock In ◽  
Distributed Strain

scholarly journals Distributed Strain Measurement Using Power-Based Brillouin Sensor with Three Folded Dynamic Range

Proceedings ◽  
2019 ◽  
Vol 15 (1) ◽  
pp. 26
Author(s):  
Lee ◽  
Noda ◽  
Mizuno ◽  
Nakamura
Keyword(s):  
Spatial Resolution ◽  
Time Domain ◽  
Strain Measurement ◽  
Dynamic Range ◽  
Optical Correlation ◽  
Trade Off ◽  
Noise Floor ◽  
The Cost ◽  
Distributed Strain

We clarify that, unlike time-domain techniques, slope-assisted Brillouin optical correlation-domain reflectometry has a trade-off relation between the strain dynamic range and the spatial resolution. This trade-off is shown to be caused by its unique bell-shaped noise floor, which is inherently unavoidable in correlation-domain systems. Subsequently, we experimentally show that, at the cost of lowered spatial resolution, the strain dynamic range can be 3 times wider than the previously reported value.

scholarly journals Fiber Strain Measurement for Wide Region Quasidistributed Sensing by Optical Correlation Sensor with Region Separation Techniques

2010 ◽  
Vol 2010 ◽  
pp. 1-10 ◽  
Author(s):  
Xunjian Xu ◽  
Antonio Bueno ◽  
Koji Nonaka ◽  
Salvador Sales
Keyword(s):  
Strain Measurement ◽  
Optical Pulse ◽  
Optical Correlation ◽  
Separation Techniques ◽  
Wide Region ◽  
Sensing System ◽  
Wavelength Multiplexing ◽  
Distributed Strain

The useful application of optical pulse correlation sensor for wide region quasidistributed fiber strain measurement is investigated. Using region separation techniques of wavelength multiplexing with FBGs and time multiplexing with intensity partial reflectors, the sensor measures the correlations between reference pulses and monitoring pulses from several cascadable selected sensing regions. This novel sensing system can select the regions and obtain the distributed strain information in any desired sensing region.

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