Temperature Sensitivity Enhancement of the Nano-Film Coated Long-Period Fiber Gratings
Temperature Sensitivity Enhancement of the Nano-Film Coated Long-Period Fiber Gratings
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纳米镀膜长周期光纤光栅的温度敏感性增强
DOI：
10.1109/jsen.2016.2519927
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发表时间：
2016-04-15
影响因子：
4.3
通讯作者：
Wang, Tingyun
中科院分区：
文献类型：
--
作者：
Zou, Fang;Liu, Yunqi;Wang, Tingyun
提出了一种提高长周期光纤光栅温度灵敏度的新方法。采用原子层沉积技术在普通单模光纤写入的长周期光纤光栅上沉积了存款Al 2 O3纳米薄膜。然后，用聚合物材料封装涂覆的长周期光纤光栅。提出了四层圆柱波导中混合模的理论模型，并进行了数值分析。实验结果表明，采用200 nm纳米薄膜包覆硅橡胶封装的长周期光纤光栅的HE 1，10模温度灵敏度可达0.77 nm/℃。其温度灵敏度比裸长周期光纤光栅提高近一个数量级。从理论和实验上研究了各种物理效应对提高温度灵敏度的影响。实验结果与理论分析相吻合。
We present a new method to improve the temperature sensitivity of the long-period fiber gratings (LPFGs). The atomic layer deposition technology is used to deposit Al2O3 nanofilm on the LPFG written in the conventional single-mode fiber. Then, the coated LPFG is packaged by the polymer material. The theoretical model of the hybrid modes in the four-layer cylindrical waveguide is proposed for a numerical analysis. Experimental results show that the temperature sensitivity up to 0.77 nm/degrees C is achieved for the HE1,10 mode of the LPFG coated with 200-nm nano-film and then packaged by the silicone rubber. The temperature sensitivity is almost one order magnitude larger than that of the bare LPFG. Various physical effects for the temperature sensitivity enhancement are investigated theoretically and experimentally. The experimental results are well consistent with a theoretical analysis.