Wavelength detection using optical fiber speckle patterns

2002 ◽  
Author(s):  
Byungchoon Yang ◽  
Il-Min Lee ◽  
Byoungho Lee
Keyword(s):  
Optical Fiber ◽  
Speckle Patterns ◽  
Wavelength Detection

Design of Transformer Temperature Measurement System Based on Fiber Grating

2013 ◽  
Vol 291-294 ◽  
pp. 2149-2153
Author(s):  
Yan Qing Li ◽  
Kai Hang Sun ◽  
Liang Zhao ◽  
Fang Yuan Wei
Keyword(s):  
Optical Fiber ◽  
Temperature Measurement ◽  
Measuring System ◽  
Fiber Grating ◽  
Software System ◽  
Rise Rate ◽  
Tunable Release ◽  
Transformer Winding ◽  
Temperature Measurement System ◽  
Wavelength Detection

This paper expounds the hardware and software system design for the transformer temperature measurement based on optical fiber grating. According to the linear relationship between the Bragg grating center wavelength and temperature, the FBG-T-01 optical fiber sensors constitute a sensor array through the WDM principles. And the tunable release-pearl ROM cavity (F-P) filtering demodulation method is used for wavelength detection. On the basis, the polynomial fitting algorithm for peak is proposed. The software system could find anomaly problem of transformer winding problem timely. The measurement point temperature and the temperature rise rate both are the criterions to judging transformer winding temperature normal or not. The experimental results show that optical fiber grating temperature measuring system is accurate and stable. It can perform the transformer temperature measurement task favourably.

scholarly journals Monitoring of vital bio-signs by analysis of speckle patterns in a fabric-integrated multimode optical fiber sensor

2020 ◽  
Vol 28 (14) ◽  
pp. 20830
Author(s):  
Aviya Bennett ◽  
Yevgeny Beiderman ◽  
Sergey Agdarov ◽  
Yafim Beiderman ◽  
Rotem Hendel ◽  
...  
Keyword(s):  
Optical Fiber ◽  
Optical Fiber Sensor ◽  
Fiber Sensor ◽  
Multimode Optical Fiber ◽  
Speckle Patterns
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