Microfiber Bragg Grating Hydrogen Sensors

被引：38

作者：

Yu, Zhipeng ^{[1
]}

Jin, Long ^{[1
]}

Chen, Lingjun ^{[1
]}

Li, Jie ^{[1
]}

Ran, Yang ^{[1
]}

Guan, Bai-Ou ^{[1
]}

机构：

[1] Jinan Univ, Inst Photon Technol, Guangdong Prov Key Lab Opt Fiber Sensing & Commun, Guangzhou 510632, Guangdong, Peoples R China

来源：

IEEE PHOTONICS TECHNOLOGY LETTERS | 2015年 / 27卷 / 24期

基金：

中国国家自然科学基金;

关键词：

Hydrogen sensors; fiber Bragg gratings; optical microfibers; OPTICAL-FIBER; PD; INTERFEROMETER; FILM;

D O I：

10.1109/LPT.2015.2478445

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：

In this letter, hydrogen sensors based on microfiber Bragg gratings (mFBGs) with palladium coatings are presented. The reflection peak of a grating with a diameter of 3.3 mu m can shift by -1.08 nm when exposed to hydrogen with a concentration of 5%, as a result of the evanescent field interaction with the coated palladium film. The resultant wavelength shift is 26 times higher than its counterpart in the conventional singlemode fiber. Calculated and measured results show that thinner gratings enable higher sensitivities due to the stronger evanescent fields. The temperature sensitivity increases by only 27%, and thus the temperature cross sensitivity is greatly lowered. The response time of the reflection peak shift is similar to 60 s.

引用

收藏

页码：2575 / 2578

页数：4

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