Title :
Intensity-Modulated Strain Sensor Based on Fiber In-Line Mach–Zehnder Interferometer
Author :
Jiangtao Zhou ; Yiping Wang ; Changrui Liao ; Guolu Yin ; Xi Xu ; Kaiming Yang ; Xiaoyong Zhong ; Qiao Wang ; Zhengyong Li
Author_Institution :
Key Lab. of Optoelectron. Devices & Syst. of Minist. of Educ. & Guangdong Province, Shenzhen Univ., Shenzhen, China
Abstract :
We demonstrated a novel intensity-modulated strain sensor based on a fiber in-line Mach-Zehnder interferometer with a large fringe visibility of up to 17 dB, which was fabricated by splicing a section of thin core fiber between two sections of single mode fibers with one misalignment-spliced joint. Such a strain sensor exhibited an ultrahigh sensitivity of -0.023 dBm/με within a measurement range of 500 με, which is about one order of magnitude higher than that reported in references. Displacement and stress distributions at the misalignment spliced joint were simulated by use of finite element method. In addition, the proposed strain sensor has an advantage of compact size of ~10 mm.
Keywords :
Mach-Zehnder interferometers; fibre optic sensors; finite element analysis; intensity modulation; optical fibre fabrication; optical modulation; splicing; strain sensors; thin film sensors; displacement distribution; fiber in-line Mach-Zehnder interferometer; finite element method; intensity modulated strain sensor; misalignment spliced joint; optical fabrication; single mode fibers; stress distribution; thin core fiber section splicing; Joints; Lead; Optical fiber communication; Optical fiber sensors; Tensile strain; Elasto-optical effect; intensity-modulation; misalignment splicing; physical deformation; strain sensor; thin core fiber;
Journal_Title :
Photonics Technology Letters, IEEE
DOI :
10.1109/LPT.2013.2295826