A distributed hydrogen gas sensor using high refractive index optical fiber
A distributed hydrogen gas sensor using high refractive index optical fiber
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一种采用高折射率光纤的分布式氢气传感器
DOI：
10.1166/sl.2011.1592
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发表时间：
2011
期刊：
影响因子：
--
通讯作者：
S. Okazaki
中科院分区：
文献类型：
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作者：
松井義弘;木村和彦;中野和司;S. Okazaki
研制了一种可检测氢气沿光纤沿着泄漏的光纤气体传感器装置。该传感器由铋基光纤（芯）和溶胶-凝胶法制备的铂支撑三氧化钨薄膜（Pt/WO 3传感包层）组成。工作原理是基于从纤芯泄漏到包层区域的倏逝波的吸收。由于铋系光纤的折射率比三氧化钨的折射率高，因此期待实现低损耗的渐逝型氢传感器。在空气环境中，传感器的传播损耗约为0.25dB/m。该值应足以实现几十米范围内的分布式氢传感。当暴露于10%H2/N2气体时，通过5cm长的装置传播的光功率降低约10%，并且获得相对良好的再现性。
A fiber-optic gas sensor device, which can detect hydrogen leakage along the fiber, was developed. The sensor device was composed of bismuth-based optical fiber (core) and sol–gel derived platinum-supported tungsten trioxide thin film (Pt/WO3 sensing clad). Operating principle is based on the absorption of evanescent-wave leaking from the fiber core into the clad region. Since the refractive index of the bismuth-based optical fiber is higher than that of tungsten trioxide, realization of the low loss evanescent-type hydrogen sensor is expected. The propagation loss of the fabricated sensor in air condition was about 0.25 dB/m. The value should be enough to realize the distributed hydrogen sensing in the range of several tens of meters. The light power propagating through the device of 5 cm length decreased by about 10% with the exposure to 10% H2/N2 gas and relatively good reproducibility was obtained.