All-Fiber Curvature Sensor Based on Multimode Interference

被引：228
作者：
Gong, Yuan [1 ]
Zhao, Tian [1 ]
Rao, Yun-Jiang [1 ]
Wu, Yu [1 ]
机构：
[1] Univ Elect Sci & Technol China, Educ Minist China, Key Lab Opt Fiber Sensing & Commun, Chengdu 611731, Sichuan, Peoples R China
来源：
IEEE PHOTONICS TECHNOLOGY LETTERS | 2011年 / 23卷 / 11期
关键词：
Curvature; fiber-optic sensors; multimode interference; MODE;
D O I：
10.1109/LPT.2011.2123086
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 fiber-optic curvature sensor based on the single-mode-multimode-single-mode (SMS) fiber structure is developed. Several notches in the transmitted spectrum of the SMS fiber structure are generated due to the multimode interference effect. The dependence of the wavelength shifts and intensity changes of three transmission notches on the applied curvature are different from each other. The maximum sensitivities of wavelength-curvature and intensity-curvature relationships are -10.38 nm/m(-1) and -130.37 dB/m(-1), respectively. By properly choosing to measure wavelength shifts or intensity changes, high sensitivity measurement of curvature over a large scale can be obtained. The wavelength of the second notch is insensitive to the curvature change, offering the possibility for simultaneous measurement of curvature and other parameters such as temperature or strain.
引用
收藏
页码：679 / 681
页数：3
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