Simultaneous measurement of temperature and humidity based on spherical structure optical fiber interferometer

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 temperatu...

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Bibliographic Details
Published in:Optoelectronics letters 2020-07, Vol.16 (4), p.256-261
Main Authors: Li, Jia-xin, Tong, Zheng-rong, Zhao, Xu-dong, Zhang, Wei-hua, Qin, Juan
Format: Article
Language:English
Subjects:
Humidity
Lasers
Mach-Zehnder interferometers
Optical Devices
Optical fibers
Optics
Photonics
Physics
Physics and Astronomy
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Summary: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/°C and 0.090 nm/°C from 10 °C to 60 °C, 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.
ISSN:1673-1905
1993-5013
DOI:10.1007/s11801-020-9144-8