基于温度自补偿的光子晶体光纤光栅的应变传感特性研究

发布时间：2018-11-17 20:36

【摘要】：在正六边形包层空气孔中填充特定负折射率温度系数材料,通过温度自补偿实现非温度依赖的应变传感检测。基于耦合模理论,建立传感分析模型,结合控制变量法对不同温度和波长下的模式有效折射率进行数值分析。在包层空气孔填充不同液体材料,探究基模以及一阶光波模式的谐振波长对温度的不敏感特性,并对PCFBG中不同光波模式的温度/应变传感特性进行对比研究。计算结果表明,在包层空气孔填充材料I,环境温度由-20℃升至100℃,基模光场的反射峰中心波长仅漂移2.3pm,应变灵敏度达到1.234 8pm/με;在包层空气孔填充材料II,一阶光波模式仅漂移4.6pm,应变灵敏度为1.311 8pm/με。表明在光子晶体光纤包层空气孔中填充对应的温度补偿材料能有效实现具备温度稳定性的高灵敏度应变传感监测。
[Abstract]:By filling the positive hexagonal cladding air hole with a specific negative refractive index temperature coefficient material, the non-temperature-dependent strain sensing detection is realized by temperature self-compensation. Based on the coupled mode theory, the sensing analysis model is established, and the effective refractive index of the mode at different temperatures and wavelengths is numerically analyzed with the control variable method. The temperature insensitive characteristics of the resonant wavelength of the fundamental mode and the first order light wave mode are investigated by filling the cladding air hole with different liquid materials, and the temperature / strain sensing characteristics of the different light wave modes in PCFBG are compared. The calculated results show that when the ambient temperature increases from -20 鈩，

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