In this paper, a comprehensive study is conducted to determine the optimum geometry for tapered fibre-optic gas sensors. A staircase concatenation method is introduced to investigate the effects of taper angle and fibre taper diameter on the sensitivity of the tapered-fibre sensors. The simulations show that the sensitivity of the tapered fibre-optic sensor increases by increasing the taper angle and reducing the taper diameter. To evaluate the predictions of the presented model, different tapered-fibre sensors have been fabricated and tested. The surface of the tapered fibres has been coated with palladium in order to determine the sensitivity of the sensors to hydrogen exposure. By increasing the percentage of the hydrogen in the surrounding environment, a shift of the output interference spectrum is observed. The experimental results confirm the simulation results obtained for the effect of geometry on the sensitivity of the sensors.

中文翻译：

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锥形几何形状对锥形纤维气体传感器灵敏度影响的研究

在本文中，进行了一项综合研究，以确定锥形光纤气体传感器的最佳几何形状。引入阶梯串联方法来研究锥角和光纤锥径对锥形光纤传感器灵敏度的影响。仿真表明，锥形光纤传感器的灵敏度通过增加锥角和减小锥直径而增加。为了评估所提出模型的预测，已经制造和测试了不同的锥形光纤传感器。锥形纤维的表面涂有钯，以确定传感器对氢暴露的敏感性。通过增加周围环境中氢的百分比，观察到输出干涉光谱的偏移。