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27 March 2022 A high-reliable dual light sources multiplexing FBG demodulation system for space application
Yunhong Zhu, Jing Jin, Yibo Zhang, Hongfei Xu
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Proceedings Volume 12169, Eighth Symposium on Novel Photoelectronic Detection Technology and Applications; 121692W (2022) https://doi.org/10.1117/12.2623244
Event: Eighth Symposium on Novel Photoelectronic Detection Technology and Applications, 2021, Kunming, China
Abstract
The harsh space environment brings great challenges to Fiber Bragg grating (FBG) sensors and FBG demodulation systems. The FBG demodulation system needs the redundancy design to improve reliability in the space environment. A high-reliable dual light sources multiplexing FBG demodulation system is proposed. It consists of two light sources, two 1 × 4 optical fiber couplers, four 1 × 3 optical fiber couplers, four photodetectors, and a signal processing circuit. The proposed FBG demodulation system eliminates single-point failures thoroughly and improves the FBG demodulation capability. The failure mode analysis is used for three different types of FBG demodulation systems. The results of failure mode analysis show that the proposed FBG demodulation system has higher reliability compared with the other two FBG demodulation systems in different failure cases
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Yunhong Zhu, Jing Jin, Yibo Zhang, and Hongfei Xu "A high-reliable dual light sources multiplexing FBG demodulation system for space application", Proc. SPIE 12169, Eighth Symposium on Novel Photoelectronic Detection Technology and Applications, 121692W (27 March 2022); https://doi.org/10.1117/12.2623244
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KEYWORDS
Fiber Bragg gratings
Demodulation
Sensors
Multiplexing
Reliability
Failure analysis
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