Abstract

An optical fiber sensor for simultaneous measurement of humidity and temperature is proposed and investigated. The sensor is composed of a pokal taper and a peanut taper spliced at both ends of a single-mode fiber, respectively. In the experiment, the variations of the dip wavelength are used to measure the parameter sensing characteristics. The sensing area is coated with a concentration of 1 mg/ml graphene dispersion by using the optical driven deposition method. Experimental results show that the sensor has a good linear relationship with temperature and humidity. When the humidity measurement range is $ 30\% {\rm{RH}} \sim 70\% {\rm{RH}} $, the sensitivities are 0.059 nm/%RH and 0.133 nm/%RH, respectively. When the temperature measurement range is $ {0^ \circ }{\rm C} \sim {40^ \circ }{\rm C} $, the sensitivities are 0.254 nm/°C and 0.269 nm/°C, respectively. This sensor has the advantages of small size, low cost, and high response.

© 2019 Optical Society of America

Research on simultaneous measurement of temperature and refractive index based on thin-core fiber and pokal taper

Yimei Zhong, Juan Qin, Zhengrong Tong, Weihua Zhang, Wei Huang, and Wenlin Gao
Appl. Opt. 58(8) 1955-1960 (2019)

In-fiber Mach–Zehnder interferometer based on multi-core microfiber for humidity and temperature sensing

Junni Cheng
Appl. Opt. 59(3) 756-763 (2020)

Single core-offset Mach-Zehnder interferometer coated with PVA for simultaneous measurement of relative humidity and temperature

Zhenyong Dong, Yaqi Jin, Guanbin Zhang, Jie Zhou, Chunyang Liu, Fengxiang Liu, Zhongchao Wei, Faqiang Wang, Chunhua Tan, and Hongyun Meng
Opt. Express 29(15) 24102-24117 (2021)

Simultaneous measurement of temperature and relative humidity based on a twisted microfiber coated with nanomaterials

Dandan Sun, Shaomin Xu, Shan Liu, Yongming Fu, and Jie Ma
Appl. Opt. 60(13) 3849-3855 (2021)

Humidity sensor based on a graphene oxide-coated few-mode fiber Mach-Zehnder interferometer

X. Fan, Q. Wang, M. Zhou, F. Liu, H. Shen, Z. Wei, F. Wang, C. Tan, and H. Meng
Opt. Express 28(17) 24682-24692 (2020)