Wang Ying, Wang D N, Yang Fan, Li Zhi, Yang Minghong
Opt Lett. 2014 Jul 1;39(13):3872-5. doi: 10.1364/OL.39.003872.
A sensitive hydrogen sensing device based on a selectively infiltrated photonic crystal fiber (PCF) coated with Pt-loaded WO₃ is demonstrated. With Pt-loaded WO₃ coating acting as the catalytic layer, hydrogen undergoes an exothermic reaction with oxygen and releases heat when the device is exposed to gas mixtures of air and hydrogen, which induces local temperature change in the PCF and hence leads to the resonant wavelength shift of the proposed device. The maximum wavelength shift of 98.5 nm is obtained with a 10-mm-long infiltrated PCF for 4% (v/v) H₂ concentration, and a hydrogen sensitivity of 32.3 nm/% (v/v) H₂ is achieved within the range of 1%-4% (v/v) H₂ in air.
展示了一种基于选择性渗透的光子晶体光纤（PCF）涂覆负载铂的三氧化钨的灵敏氢传感装置。以负载铂的三氧化钨涂层作为催化层，当该装置暴露于空气和氢气的混合气体中时，氢气与氧气发生放热反应并释放热量，这会引起光子晶体光纤中的局部温度变化，从而导致该装置的共振波长偏移。对于4%（v/v）的氢气浓度，使用10毫米长的渗透光子晶体光纤可获得最大波长偏移98.5纳米，并且在空气中氢气浓度为1% - 4%（v/v）的范围内，实现了32.3纳米/（%（v/v）H₂）的氢灵敏度。
