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19 May 2011Pd-Ag film coated cascaded long period gratings for hydrogen gas sensing
A Mach-Zehnder-like interferometer based on cascaded long period gratings with palladium silver (Pd-Ag) film coating
is developed for monitoring the hydrogen concentration. The visibility of fringes is measured using Fourier analysis. The
basic theory was given and preliminary experiment had been proved that this sensor can used to monitor the hydrogen
concentration. The sensor showed a good response.
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Zhen Yang, Xiujuan Yu, Xiaohui Chu, Min Zhang, Shurong Lai, Yanbiao Liao, Qisheng Li, Yi Zhang, Zhi Zhuang, "Pd-Ag film coated cascaded long period gratings for hydrogen gas sensing," Proc. SPIE 7753, 21st International Conference on Optical Fiber Sensors, 77539R (19 May 2011); https://doi.org/10.1117/12.885910