TY - JOUR
T1 - High-sensitivity temperature sensor based on PDMS-coated photonic crystal fiber interferometer
AU - Chen, Ling
AU - Tian, Jiajun
AU - Wu, Qiang
AU - Wang, Jiawei
AU - Li, Jiewen
AU - Yao, Yong
N1 - Funding information: This work was supported in part by the National Natural Science Foundation of China (No. 61675055, and 62105080) and in part by the Shenzhen Science and Technology Program Project Nos. JCYJ20190806143818818, JCYJ20220531095604009 and GXWD20201230155427003-20200731103843002).
PY - 2023/10/1
Y1 - 2023/10/1
N2 - Temperature measurement is an essential parameter to be monitored in various industrial, medical, and environmental applications. Developing high-performance and robust fiber optic sensors that can accurately and reliably operate in harsh environments is a challenge. Here, a photonic crystal fiber interferometer (PCFI) coated with polydimethylsiloxane (PDMS) film is theoretically simulated and experimentally demonstrated for temperature measurement. According to the simulated and experimental results, the influence of PCF's length and PDMS film's thickness on temperature response is little. Compared with bare PCFI (2 cm PCF) with temperature sensitivity of 5.3 pm/°C, the temperature sensitivity (-0.17 nm/°C) of the proposed PDMS-coated PCFI is improved by 32 times. Furthermore, the strain sensitivities of PDMS-coated PCFIs with 1, 2, and 3 cm PCF are only −1.15, −1.88, and −1.21 pm/με, respectively. Therefore, the temperature-strain cross-sensitivity of PDMS-coated PCFI is negligible (∼0.01 ℃/με). Besides, the proposed temperature sensor has good reversibility, repeatability, stability, and property of strain-insensitive, which has potential applications in harsh environmental monitoring.
AB - Temperature measurement is an essential parameter to be monitored in various industrial, medical, and environmental applications. Developing high-performance and robust fiber optic sensors that can accurately and reliably operate in harsh environments is a challenge. Here, a photonic crystal fiber interferometer (PCFI) coated with polydimethylsiloxane (PDMS) film is theoretically simulated and experimentally demonstrated for temperature measurement. According to the simulated and experimental results, the influence of PCF's length and PDMS film's thickness on temperature response is little. Compared with bare PCFI (2 cm PCF) with temperature sensitivity of 5.3 pm/°C, the temperature sensitivity (-0.17 nm/°C) of the proposed PDMS-coated PCFI is improved by 32 times. Furthermore, the strain sensitivities of PDMS-coated PCFIs with 1, 2, and 3 cm PCF are only −1.15, −1.88, and −1.21 pm/με, respectively. Therefore, the temperature-strain cross-sensitivity of PDMS-coated PCFI is negligible (∼0.01 ℃/με). Besides, the proposed temperature sensor has good reversibility, repeatability, stability, and property of strain-insensitive, which has potential applications in harsh environmental monitoring.
KW - PDMS film
KW - Photonic crystal fiber
KW - Strain-insensitive
KW - Temperature measurement
UR - http://www.scopus.com/inward/record.url?scp=85163834685&partnerID=8YFLogxK
U2 - 10.1016/j.yofte.2023.103409
DO - 10.1016/j.yofte.2023.103409
M3 - Article
AN - SCOPUS:85163834685
SN - 1068-5200
VL - 80
JO - Optical Fiber Technology
JF - Optical Fiber Technology
M1 - 103409
ER -