A distributed optical fiber sensor for hydrogen detection based on Pd, and Mg alloys

2010 ◽  
Author(s):  
C. Perrotton ◽  
M. Slaman ◽  
N. Javahiraly ◽  
H. Schreuders ◽  
B. Dam ◽  
...  
Keyword(s):  
Optical Fiber ◽  
Optical Fiber Sensor ◽  
Mg Alloys ◽  
Fiber Sensor ◽  
Hydrogen Detection ◽  
Distributed Optical Fiber Sensor ◽  
Distributed Optical Fiber

scholarly journals Measurement Improvement of Distributed Optical Fiber Sensor via Lorenz Local Single Peak Fitting Algorithm

Symmetry ◽  
2021 ◽  
Vol 13 (7) ◽  
pp. 1166
Author(s):  
Bin Liu ◽  
Jianping He ◽  
Shihai Zhang ◽  
Yinping Zhang ◽  
Jianan Yu ◽  
...  
Keyword(s):  
Optical Fiber ◽  
Frequency Shift ◽  
Optical Fiber Sensor ◽  
Gain Spectrum ◽  
Fiber Sensor ◽  
Peak Fitting ◽  
Fitting Algorithm ◽  
Distributed Optical Fiber Sensor ◽  
Brillouin Gain ◽  
Distributed Optical Fiber

Brillouin frequency shift (BFS) of distributed optical fiber sensor is extracted from the Brillouin gain spectrum (BGS), which is often characterized by Lorenz type. However, in the case of complex stress and optical fiber self damage, the BGS will deviate from Lorenz type and be asymmetric, which leads to the extraction error of BFS. In order to enhance the extraction accuracy of BFS, the Lorenz local single peak fitting algorithm was developed to fit the Brillouin gain spectrum curve, which can make the BSG symmetrical with respect to the Brillouin center frequency shift. One temperature test of a fiber-reinforced polymer (FRP) packaged sensor whose BSG curve is asymmetric was conducted to verify the idea. The results show that the local region curve of BSG processed by the developed algorithm has good symmetry, and the temperature measurement accuracy obtained by the developed algorithm is higher than that directly measured by demodulation equipment. Comparison with the reference temperature, the relative measurement error measured by the developed algorithm and BOTDA are within 4% and 8%, respectively.

An All Fiber Laser for Distributed Optical Fiber Sensor

2010 ◽  
Vol 37 (6) ◽  
pp. 1501-1504
Author(s):  
高存孝 Gao Cunxiao ◽  
朱少岚 Zhu Shaolan ◽  
冯莉 Feng Li ◽  
宋志远 Song Zhiyuan ◽  
曹宗英 Cao Zongying ◽  
...  
Keyword(s):  
Optical Fiber ◽  
Fiber Laser ◽  
Optical Fiber Sensor ◽  
Fiber Sensor ◽  
Distributed Optical Fiber Sensor ◽  
Distributed Optical Fiber

Strain Transfer Law of Distributed Optical Fiber Sensor

2019 ◽  
Vol 46 (4) ◽  
pp. 0410001 ◽  
Author(s):  
章征林 Zhang Zhenglin ◽  
高磊 Gao Lei ◽  
孙阳阳 Sun Yangyang ◽  
张清华 Zhang Qinghua ◽  
曾鹏 Zeng Peng
Keyword(s):  
Optical Fiber ◽  
Optical Fiber Sensor ◽  
Fiber Sensor ◽  
Strain Transfer ◽  
Distributed Optical Fiber Sensor ◽  
Distributed Optical Fiber

scholarly journals Comparative Experimental Study of a High-Temperature Raman-Based Distributed Optical Fiber Sensor with Different Special Fibers

Sensors ◽  
2019 ◽  
Vol 19 (3) ◽  
pp. 574 ◽  
Author(s):  
Ismail Laarossi ◽  
María Quintela-Incera ◽  
José López-Higuera
Keyword(s):  
Experimental Study ◽  
High Temperature ◽  
Optical Fiber ◽  
Optical Fibers ◽  
Optical Fiber Sensor ◽  
Time Domain Reflectometry ◽  
Fiber Sensor ◽  
Mechanical Resistance ◽  
Distributed Optical Fiber Sensor ◽  
Distributed Optical Fiber

An experimental study of a high temperature distributed optical fiber sensor based on Raman Optical-Time-Domain-Reflectometry (ROTDR) (up to 450 °C) and optical fibers with different coatings (polyimide/carbon, copper, aluminum and gold) is presented. Analysis of the distributed temperature sensor (DTS) measurements determined the most appropriate optical fiber to be used in high temperature industrial environment over long periods of time. To demonstrate the feasibility of this DTS for an industrial application, an optical cable was designed with the appropriate optical fiber and it was hermetically sealed to provide the required mechanical resistance and isolate the fiber from environmental degradations. This cable was used to measure temperature up to 360 °C of an industrial furnace during 7 days.

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