Long-Period Fiber Grating Within D-Shaped Fiber Using Magnetic Fluid for Magnetic-Field Detection

被引：73

作者：

Gao, Lei ^{[1
]}

Zhu, Tao ^{[1
]}

Deng, Ming ^{[1
]}

Chiang, Kin Seng ^{[2
]}

Sun, Xiaokang ^{[1
]}

Dong, Xiaopeng ^{[3
]}

Hou, Yusong ^{[1
]}

机构：

[1] Chongqing Univ, Key Lab Optoelect Technol & Syst, Minist Educ, Chongqing 400044, Peoples R China

[2] City Univ Hong Kong, Dept Elect Engn, Kowloon, Hong Kong, Peoples R China

[3] Xiamen Univ, Dept Elect Engn, Fuzhou 361000, Fujian, Peoples R China

来源：

IEEE PHOTONICS JOURNAL | 2012年 / 4卷 / 06期

关键词：

Sensors; fiber gratings; light-material interactions; WRITTEN; CO2-LASER; INDEX;

D O I：

10.1109/JPHOT.2012.2226439

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：

A magnetic sensor utilizing long-period fiber grating (LPFG) written by high frequency CO2 laser pulses in a D-shaped fiber and the magneto-optical effect of magnetic fluid is proposed. Because of the high evanescent field of the grating structure in D-shaped fiber, by immersing the LPFG with a period of 685 mu m into a water-based magnetic fluid within a capillary tube, the redshift as high as 33.5 nm of the resonant wavelength of the grating is observed when the external magnetic-field intensity is 189.7 mT, resulting in a sensitivity of 176.4 pm/mT. The hysteresis effect is observed and explained by the characters of magnetic fluid. Such kind of sensors would find potential applications in magnetic sensing fields.

引用

页码：2095 / 2104

页数：10

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