title: Optical fiber axial micro-displacement sensor based on Mach-Zehnder interferometer.
abstract: A Mach-Zehnder interferometer (MZI) based fiber axial micro-displacement sensor was proposed. The MZI was constructed by a bowknot-type taper (BTT) combining with a fiber core-offset between two single mode fibers (SMFs). The axial micro-displacement of the core offset is correlated with the MZI transmission spectrum and varied with the interferometer arm length. For the arm length L of 12, 18, 24 and 30 mm, the proposed sensors showed high sensitivity of -0.362 dB/μm, -0.385 dB/μm, -0.332 dB/μm and -0.235dB/μm, and temperature errors of -0.056 dB/°C, -0.036 dB/°C, -0.044 dB/°C, -0.048 dB/°C, respectively. The theoretical simulations of the energy distributions were also given. The obtained sensitivity of -0.385 dB/μm is about 150 times high than that of the current similar existing axial micro-displacement sensor.
authors.forename: Changyu
authors.initials: C
authors.lastname: Shen
authors.forename: Youqing
authors.initials: Y
authors.lastname: Wang
authors.forename: Jinlei
authors.initials: J
authors.lastname: Chu
authors.forename: Yanfang
authors.initials: Y
authors.lastname: Lu
authors.forename: Yi
authors.initials: Y
authors.lastname: Li
authors.forename: Xinyong
authors.initials: X
authors.lastname: Dong
mesh_terms: D003198:Computer Simulation; D017076:Computer-Aided Design; D004867:Equipment Design; D019544:Equipment Failure Analysis; D005336:Fiber Optic Technology / Q000295:instrumentation*; D007368:Interferometry / Q000295:instrumentation*; D008962:Models, Theoretical; D009038:Motion; D055096:Optical Devices; D012031:Refractometry / Q000295:instrumentation*; D019415:Torque; D014159:Transducers; D014160:Transducers, Pressure