Cost-effective fiber multiplexing system based on low coherence interferometers and application to temperature measurement

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• 作者：Meng Jiang ; Zhongze Zhao ; Kun Li ; Zeming Wang ; Yage Zhan ; Hongying Zhou…
• 关键词：Mach ; Zehnder interferometer ; low ; coherence ; multiplexing fiber system
• 刊名：Photonic Sensors
• 出版年：2016
• 出版时间：December 2016
• 年：2016
• 卷：6
• 期：4
• 页码：318-323
• 全文大小：515 KB
• 刊物类别：Physics and Astronomy
• 刊物主题：Chinese Library of Science
  Laser Technology and Physics and Photonics
  Microwaves, RF and Optical Engineering
  Measurement Science and Instrumentation
  Optics, Optoelectronics, Plasmonics and Optical Devices
  
• 出版者：University of Electronic Science and Technology of China, co-published with Springer
• ISSN：2190-7439
• 卷排序：6

文摘

Based on the low-coherence interferometric principles, a cost-effective all-fiber Mach-Zehnder multiplexing system is proposed and demonstrated. The system consists of two interferometers: sensing interferometer and demodulation interferometer. By scanning an optical tunable delay line back and forth constantly with a stable speed, sensing fibers with different optical paths can be temporal interrogated. The system is experimentally proved to have a high performance with a good stability and low system noises. The multiplexing capacity of the system is also investigated. An experiment of measuring the surrounding temperature is carried out. A sensitivity of 12 μm/°C is achieved within the range of 20°C to 80°C. This low cost fiber multiplexing system has a potential application in the remote monitoring of temperature and strain in building structures, such as bridges and towers.