| Application of two-mode fiber in voltage sensor |
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| 作者姓名： | 王河林 毕卫红 杨爱军 刘丰 |
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| 作者单位： | College of Information and Engineering Yanshan University Qinhuangdao 066004，College of Information and Engineering Yanshan University Qinhuangdao 066004，College of Mathematics and Information Science Hebei Normal University Shijiazhuang 050016，College of Information and Engineering Yanshan University Qinhuangdao 066004 |
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| 基金项目： | This work was supported by the National Natural Science Foundation of China under Grant No. 50477001. |
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| 摘 要： | A new mode patter's demodulation technique is put forward. Researches of experiment and theory show that the coupling efficiency of two kinds of different fibers depends on the relative offset between the two fibers when the core diameter of the information pick-up fiber is a little smaller than the major semi-axes of the elliptical-core two-mode fiber. Especially, when the relative offsetδ≈1, fusing splice coupling efficiency reaches peak value. Furthermore, based on the new demodulation scheme, the sine voltage signal applied on the piezoelectric lead zirconate titanate (PZT) is obtained and the detection precision of the system is within±0.2% when the voltage changes between 0.1 and 20 V.
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