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Differential transmissive fiber‐optic distance sensor
Author(s) -
Shan Mingguang,
Min Rui,
Zhong Zhi,
Wang Ying,
Hao Bengong,
Zhang Yabin
Publication year - 2014
Publication title -
microwave and optical technology letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.304
H-Index - 76
eISSN - 1098-2760
pISSN - 0895-2477
DOI - 10.1002/mop.28275
Subject(s) - optical fiber , offset (computer science) , fiber optic sensor , differential phase , polarization maintaining optical fiber , sensitivity (control systems) , optics , interference (communication) , electronic engineering , materials science , engineering , electrical engineering , physics , computer science , channel (broadcasting) , keying , programming language
Based on the characteristic of a transmissive intensity‐modulated fiber‐optic distance sensor (IFDS) that the offset distance between the axes of emitting fiber and receiving fiber changes the distance‐power response phase, a novel differential fiber distance sensor is constructed by one emitting fiber and twin receiving fibers, thereby, achieving high sensitivity and anti‐interference capacity without reducing the linear range through subtraction of two power signals with given phase received by the detection systems and data processing. Simulation and experimental results indicate that the new differential fiber distance sensor improves sensitivity by about 108%, results in the significant improvement of IFDS anti‐interference capability, and enables IFDS to be more suitable for high accuracy bipolar absolute distance measurement. © 2014 Wiley Periodicals, Inc. Microwave Opt Technol Lett 56:1104–1107, 2014