Dual-Peak Bragg Gratings Inscribed in an All-Solid Photonic Bandgap Fiber for Sensing Applications

被引：5
|
作者：
Zhang Ji-Huang [1 ]
Liu Ning-Liang [1 ]
Wang Ying [2 ]
Ji Ling-Ling [3 ]
Lu Pei-Xiang [1 ,2 ]
机构：
[1] Huazhong Univ Sci & Technol, Wuhan Natl Lab Optoelect, Wuhan 430074, Peoples R China
[2] Wuhan Inst Technol, Lab Opt Informat Technol, Wuhan 430073, Peoples R China
[3] Wuhan Univ Sci & Technol, Coll Sci, Wuhan 430081, Peoples R China
来源：
CHINESE PHYSICS LETTERS | 2012年 / 29卷 / 07期
基金：
中国国家自然科学基金;
关键词：
REFRACTIVE-INDEX; CRYSTAL FIBERS; TEMPERATURE; SENSORS; STRAIN; SENSITIVITY;
D O I：
10.1088/0256-307X/29/7/074205
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
Bragg gratings are inscribed in an all-solid photonic bandgap fiber by use of femtosecond laser irradiation. Dual-peak structure is observed in the transmission spectrum of the induced grating, which is formed by the coupling between the forward-propagating fundamental core mode and the backward-propagating core mode or supermode. Sensing characteristics of the device are investigated experimentally by employing strain and temperature tests, and similar behavior is obtained for both resonant peaks. The strain and temperature sensitivities are 0.968pm/mu epsilon and 12.01pm/degrees C, and 0.954pm/mu epsilon and 12.04pm/degrees C, for the two peaks, respectively. This device would find potential applications in real optical fiber sensing without extra reference gratings.
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页数：4
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