TY - JOUR
T1 - Dual-Cavity Fabry-Perot Interferometric Sensors for the Simultaneous Measurement of High Temperature and High Pressure
AU - Gao, Hongchun
AU - Jiang, Yi
AU - Cui, Yang
AU - Zhang, Liuchao
AU - Jia, Jingshan
AU - Hu, Jie
N1 - Publisher Copyright:
© 2018 IEEE.
PY - 2018/12/15
Y1 - 2018/12/15
N2 - A fiber-optic hybrid sensor based on dual-cavity Fabry-Perot interferometers is proposed and demonstrated for the simultaneous measurement of high temperature and high pressure. The proposed sensor is fabricated by fusion splicing of two single-mode fibers (SMFs), a hollow core fiber (HCF), and a coreless fiber (CF), forming a four-section structure of leading SMF-SMF-HCF-CF. A micro-hole is fabricated at the end of the leading SMF using a femtosecond laser, forming an air gap between two SMFs. The CF is thinned and roughened by the femtosecond laser to form a diaphragm. The SMF-based cavity is used as the temperature sensor and the HCF-based cavity as the pressure sensor. Lengths of two cavities are interrogated simultaneously by using the fast Fourier transform-based white-light interferometry. Experimental results show that the proposed sensor exhibits a temperature sensitivity of 19.8 nm/°C and a pressure sensitivity of ∼98 nm/MPa, within the temperature range of 20°C-800°C and the pressure range of 0-10 MPa. The maximum measurement errors of temperature and pressure are 5°C and 0.2 MPa, respectively. As far as we know, it is the first time to detect the temperature of 800°C and the pressure of 10 MPa simultaneously.
AB - A fiber-optic hybrid sensor based on dual-cavity Fabry-Perot interferometers is proposed and demonstrated for the simultaneous measurement of high temperature and high pressure. The proposed sensor is fabricated by fusion splicing of two single-mode fibers (SMFs), a hollow core fiber (HCF), and a coreless fiber (CF), forming a four-section structure of leading SMF-SMF-HCF-CF. A micro-hole is fabricated at the end of the leading SMF using a femtosecond laser, forming an air gap between two SMFs. The CF is thinned and roughened by the femtosecond laser to form a diaphragm. The SMF-based cavity is used as the temperature sensor and the HCF-based cavity as the pressure sensor. Lengths of two cavities are interrogated simultaneously by using the fast Fourier transform-based white-light interferometry. Experimental results show that the proposed sensor exhibits a temperature sensitivity of 19.8 nm/°C and a pressure sensitivity of ∼98 nm/MPa, within the temperature range of 20°C-800°C and the pressure range of 0-10 MPa. The maximum measurement errors of temperature and pressure are 5°C and 0.2 MPa, respectively. As far as we know, it is the first time to detect the temperature of 800°C and the pressure of 10 MPa simultaneously.
KW - Fabry-Perot
KW - Fiber optic sensors
KW - femtosecond laser fabrication
KW - pressure measurement
KW - temperature measurement
UR - https://www.scopus.com/pages/publications/85055040933
U2 - 10.1109/JSEN.2018.2875435
DO - 10.1109/JSEN.2018.2875435
M3 - Article
AN - SCOPUS:85055040933
SN - 1530-437X
VL - 18
SP - 10028
EP - 10033
JO - IEEE Sensors Journal
JF - IEEE Sensors Journal
IS - 24
M1 - 8493605
ER -