Simultaneous measurement of temperature and humidity based on spherical structure optical fiber interferometer
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Engineering Research Center of Optoelectronic Devices and Communication Technology, Ministry of Education, Tianjin Key Laboratory of Film Electronic and Communication Devices, School of Electrical and Electronic Engineering, Tianjin University of Technology, Tianjin 300384, China

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    Abstract:

    A Mach-Zehnder interferometer (MZI) based on two spherical structures is proposed and temperature and humidity are measured simultaneously. The device is fabricated by inserting two spherical structures into a single mode optical fiber (SMF). The results of the experiment indicate that the temperature sensitivities are 0.079 nm/ºC and 0.090 nm/ºC from 10 ºC to 60 ºC, respectively. When the humidity changes from 30% to 70%, the humidity sensitivities are 0.148 nm/%RH and 0.06 nm/%RH, respectively. Therefore, temperature and humidity are measured simultaneously by the sensitive matrix. The new structure is demonstrated to be a particularly useful approach to detect temperature and humidity.

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LI Jia-xin, TONG Zheng-rong, ZHAO Xu-dong, ZHANG Wei-hua, QIN Juan. Simultaneous measurement of temperature and humidity based on spherical structure optical fiber interferometer[J]. Optoelectronics Letters,2020,16(4):256-261

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History
  • Received:August 28,2019
  • Revised:November 13,2019
  • Online: July 03,2020
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