Acta Photonica Sinica, Volume. 40, Issue 7, 1003(2011)

Hydrogen Sensor Based on Dshaped Fiber Bragg Grating Coated with WO3Pd Composite Films

DAI Jixiang1、*, YANG Minghong1, CHEN Yun1, CAO Kun2, LIAO Junsheng2, and HANG Pengcheng2
Author Affiliations
  • 1[in Chinese]
  • 2[in Chinese]
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    40 nm WO3Pd composite film was sputtered on the sideface of sidepolished fiber Bragg grating (Dshaped FBG). The FBG sensing head with 40 nm WO3Pd composite film was firstly prepared by a 5 nm WO3 coating realized with radio frequency(RF)sputtering process, followed by depositing 5 nm WO3/Pd composite film, and then finished with 30 nm Pd film by directcurrent(DC) sputtering method. SEM results show that WO3Pd composite film still has good surface morphology after several cycle′s hydrogen response, which indicates WO3Pd composite film has good mechnical property. The experiment results demonstrate hydrogen sensor has good repeatability under different concentration hydrogen. Compared to standard FBG coated with same hydrogen sensitive film, the sensitivity of Dshaped FBG is increased by 200%. When the hydrogen concentration is 6% in volume, the wavelength shift of Dshaped FBG is about 15 pm. Dshaped FBG hydrogen sensor has great potential in hydrogen′s measurement.

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    DAI Jixiang, YANG Minghong, CHEN Yun, CAO Kun, LIAO Junsheng, HANG Pengcheng. Hydrogen Sensor Based on Dshaped Fiber Bragg Grating Coated with WO3Pd Composite Films[J]. Acta Photonica Sinica, 2011, 40(7): 1003

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    Paper Information

    Received: --

    Accepted: --

    Published Online: Aug. 10, 2011

    The Author Email: Jixiang DAI (djx409081947@163.com)

    DOI:10.3788/gzxb20114007.1003

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