基于光子晶体光纤四波混频效应的甲烷传感测量  

Methane Sensing Measurement Based on Photonic Crystal Fiber Four-Wave Mixing Effect

作　　者：刘海 陈灿灿 张文 王浩然 唐守锋 Liu Hai;Chen Cancan;Zhang Wen;Wang Haoran;Tang Shoufeng(School of Information and Control Engineering,China University of Mining and Technology,Xuzhou,Jiangsu 221116,China;Xuzhou Key Laboratory of Artificial Intelligence and Big Data,Xuzhou,Jiangsu 221116,China)

机构地区：[1]中国矿业大学信息与控制工程学院,江苏徐州221116 [2]徐州市人工智能与大数据重点实验室,江苏徐州221116

出　　处：《激光与光电子学进展》2020年第19期128-135,共8页Laser & Optoelectronics Progress

基　　金：国家自然科学基金(51874301);国家重点研发计划(2017YFF0205500)。

摘　　要：通过在非线性光子晶体光纤的两个特定包层气孔内侧镀甲烷气敏薄膜,实现了一种基于简并四波混频效应的甲烷测量新方法,该方法通过建立光纤中斯托克斯光谱、反斯托克斯光谱的移动与甲烷浓度变化的直接联系来实现对甲烷气体的实时精准检测。实验结果证明,传感器的灵敏度与气敏膜厚度、泵浦波长密切相关。在同一泵浦波长下,随着气敏膜厚度增加,传感灵敏度相应增加;当气敏膜厚度保持不变时,泵浦波长越接近零色散波长,传感灵敏度越高。经过结构参数优化,最终斯托克斯光谱和反斯托克斯光谱所对应的气体传感灵敏度分别达到了-4.87 nm/%和2.83 nm/%。相关测量原理同样适用于其他气体的精准测量和混合气体的组分分析。This study introduces a new methane measurement method based on the degenerate four-wave mixing effect by coating a methane gas-sensitive film on the inside of two specific cladding pores in a photonic crystal fiber.The method accurately detects methane gas in real time by establishing a direct relationship between the movement of the Stokes and anti-Stokes spectra in optical fiber and the change in methane concentration.The experimental results show that the sensor sensitivity is closely related to the gas-sensitive film thickness and the pump wavelength.At the same pump wavelength,the sensing sensitivity increases as the thickness of the gas sensing film increases.Under an unchanged thickness of the gas-sensitive film,the closer the pump wavelength is to zero dispersion wavelength,the higher the sensing sensitivity.The gas sensing sensitivity corresponding to the Stokes and anti-Stokes spectra can reach-4.87 nm/%and 2.83 nm/%,respectively,after the structural parameter optimization.The related measurement principle is also applicable to the accurate measurement of other gases and the composition analysis of mixed gases.

关 键 词：测量 光子晶体 四波混频 非线性 气体检测 

分 类 号：TN25[电子电信—物理电子学]