Open AccessIntensity-modulated bending sensors based on rare-earth-doped fibers
Author(s) -
Yu Liu,
Zeng Liao-Liao,
Yongle Lu,
Shen Liu,
Huang Zhao-Jing
Publication year - 2011
Publication title -
wuli xuebao
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.199
H-Index - 47
ISSN - 1000-3290
DOI - 10.7498/aps.60.104218
Subject(s) - materials science , tapering , bending , cladding (metalworking) , optical fiber , fiber optic sensor , optics , optoelectronics , laser , doping , fiber laser , composite material , fiber , computer science , physics , computer graphics (images)
A novel periodic micro-tapering glass fiber based on rare-earth-doped glass fiber and its bending sensor application are investigaled. The material of fiber consists of two types of lead silicate glasses, one is for core, and the is for cladding. And it has the performances of good plasticity and easy taper. The key body of the sensor is made of the rare-earth-doped fiber which is heated by the focused CO2 laser beam in periodic and equal spacing. In this paper we constructe an intensity modulated bending sensor measurement system based on the sensor body, high resolution moving platform and optic testing platform. Principle research and experiment testing show that the designed bending sensor measurement unit has a high bending sensitivity of -28.2W/m and a low measurement error of lass than ± 1%, which is of significance for possible applications in engineering.