Chinese Optics Letters, 2006, 4 (11): 631, Published Online: Nov. 17, 2006
Application of two-mode fiber in voltage sensor Download: 583次
双模光纤 电压传感器 模斑 耦合 解调 060.2370 Fiber optics sensors 070.5010 Pattern recognition and feature extraction 070.6020 Signal processing 120.4570 Optical design of instruments
Abstract
A new mode pattern'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 offset 'delta' is about 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.
Helin Wang, Weihong Bi, Aijun Yang, Feng Liu. Application of two-mode fiber in voltage sensor[J]. Chinese Optics Letters, 2006, 4(11): 631.