Temperature Sensitivity Enhancement of the Nano-Film Coated Long-Period Fiber Gratings

被引：27
|
作者：
Zou, Fang [1 ,2 ]
Liu, Yunqi [1 ]
Zhu, Shan [1 ]
Deng, Chuanlu [1 ]
Dong, Yanhua [1 ]
Wang, Tingyun [1 ]
机构：
[1] Shanghai Univ, Sch Commun & Informat Engn, Key Lab Specialty Fiber Opt & Opt Access Networks, Shanghai 200072, Peoples R China
[2] Hebei Normal Univ Nationalities, Dept Phys, Chengde 067000, Peoples R China
来源：
IEEE SENSORS JOURNAL | 2016年 / 16卷 / 08期
基金：
中国国家自然科学基金;
关键词：
Long-period fiber gratings; nano-film coating; silicone rubber package; temperature sensor; REFRACTIVE-INDEX SENSITIVITY; CLADDING MODE; SINGLE;
D O I：
10.1109/JSEN.2016.2519927
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
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.
引用
收藏
页码：2460 / 2465
页数：6
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