Simultaneous Measurement of Temperature and Relative Humidity Based on a Microfiber Sagnac Loop and MoS2

• Published in: Journal of lightwave technology Vol. 38; no. 4; pp. 840 - 845
• Main Authors: Bai, Yuting, Miao, Yinping, Zhang, Hongmin, Yao, Jianquan
• Format: Journal Article
• Language: English
• Published: New York IEEE 15.02.2020; The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
• Subjects: Couplings; Fiber optics; Fiber-optic sensor; Humidity; Microfibers; Molybdenum; Molybdenum disulfide; MoS<named-content xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:ali="http://www.niso.org/schemas/ali/1.0/" xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" content-type="math" xlink:type="simple"> <inline-formula> <tex-math notation="LaTeX"> _2</tex-math> </inline-formula> </named-content> nanosheets; Optical fiber couplers; Optical fiber polarization; Optical fiber sensors; Optical fibers; Relative humidity; Sagnac loop; Sensitivity; Sensitivity analysis; Sensors; simultaneously sensing humidity and temperature; Sulfur
• ISSN: 0733-8724; 1558-2213
• DOI: 10.1109/JLT.2019.2947644

A fiber-optic sensor that simultaneously measures relative humidity (RH) and temperature (T) based on a microfiber Sagnac loop (MSL) and MoS 2 nanosheets is proposed. The MSL is made from a microfiber coupler fabricated by hydrogen-oxygen flame heating technology. The sensor responses to RH and T are investigated by theoretical and experimental analyses. In our experiments, the RH sensitivities achieved are 176.6 pm/%RH for the wavelength shift and −0.017 dB/%RH for the intensity in the range from 60.6 to 78.6%RH, and the T sensitivities are −123.5 pm/°C and −0.079 dB/°C. The proposed sensor has potential applications in the simultaneous measurement of RH and T.