Open AccessExperimental and theoretical study of the in- fiber twist sensor based on quasi-fan Solc structure filter
Author(s) -
Chunran Sun,
Muguang Wang,
Shuisheng Jian
Publication year - 2017
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.25.019955
Subject(s) - optics , birefringence , twist , extinction ratio , materials science , fiber optic sensor , polarization (electrochemistry) , polarization maintaining optical fiber , optical fiber , filter (signal processing) , sensitivity (control systems) , physics , computer science , wavelength , electronic engineering , chemistry , geometry , mathematics , computer vision , engineering
In this paper, a novel quasi-fan Solc structure filter based on elliptical-core spun fiber for twist sensing has been experimentally investigated and theoretically analyzed. The discrete model of spun fiber has been built to analyze the transmission characteristics of proposed sensor. Both experimental and simulated results indicate that the extinction ratio of the comb spectrum based on quasi-fan Solc birefringent fiber filter varies with twist angle and agrees well with each other. Based on the intensity modulation, the proposed twist sensor exhibits a high sensitivity of 0.02219 dB/(°/m). Moreover, thanks to the invariability of the fiber birefringence and the state of polarization of the input light, the proposed twist sensor has a very low temperature and strain sensitivity, which can avoid the cross-sensitivity problem existing in most twist sensors.