TY - GEN
T1 - Hollow Core Bragg Fiber-based Gas Pressure Sensor Using Parallel Fabry-Perot Interferometers
AU - Yang, Zongru
AU - Yuan, Weihao
AU - Yu, Changyuan
N1 - Publisher Copyright:
© 2022 IEEE.
PY - 2022/12
Y1 - 2022/12
N2 - An ultra-high sensitivity parallel-connected Fabry-Perot interferometers (FPIs) pressure sensor based on hollow core Bragg fiber (HCBF) and harmonic Vernier effect is proposed and demonstrated. One FPI (FPI-1) acts as the sensing unit while the other FPI (FPI-2) is used as the reference unit to generate the Vernier effect. The FPI-1 was prepared by fusion splicing a section of HCBF between a single-mode fiber (SMF) and a hollow silica tube (HST), and the FPI-2 was fabricated by sandwiching a piece of HCBF between two SMFs. Two FPIs with very different free spectral ranges (FSR) in the fringe pattern were connected to the 3-dB coupler parallelly, which realizes the harmonic Vernier effect and ensures the stability of the interference fringe. Both measurements of the air pressure in the range of 0-0.24 MPa and the temperature in the range of 25-55 °C were conducted using the dual FPIs sensor. Experimental results exhibited that high sensitivity of 124.35 nm/MPa with excellent linearity of 0.9967 was achieved by the sensing probe. Moreover, the calculated temperature crosstalk was as low as ~0.072 kPa/°C. The proposed sensor can be a promising candidate for real-time and high-precision gas pressure monitoring.
AB - An ultra-high sensitivity parallel-connected Fabry-Perot interferometers (FPIs) pressure sensor based on hollow core Bragg fiber (HCBF) and harmonic Vernier effect is proposed and demonstrated. One FPI (FPI-1) acts as the sensing unit while the other FPI (FPI-2) is used as the reference unit to generate the Vernier effect. The FPI-1 was prepared by fusion splicing a section of HCBF between a single-mode fiber (SMF) and a hollow silica tube (HST), and the FPI-2 was fabricated by sandwiching a piece of HCBF between two SMFs. Two FPIs with very different free spectral ranges (FSR) in the fringe pattern were connected to the 3-dB coupler parallelly, which realizes the harmonic Vernier effect and ensures the stability of the interference fringe. Both measurements of the air pressure in the range of 0-0.24 MPa and the temperature in the range of 25-55 °C were conducted using the dual FPIs sensor. Experimental results exhibited that high sensitivity of 124.35 nm/MPa with excellent linearity of 0.9967 was achieved by the sensing probe. Moreover, the calculated temperature crosstalk was as low as ~0.072 kPa/°C. The proposed sensor can be a promising candidate for real-time and high-precision gas pressure monitoring.
KW - Fabry-Perot interferometer sensor
KW - harmonic Vernier effect
KW - hollow core Bragg fiber
KW - pressure measurement
UR - https://www.scopus.com/pages/publications/85149726016
U2 - 10.1109/OGC55558.2022.10051007
DO - 10.1109/OGC55558.2022.10051007
M3 - Conference article published in proceeding or book
AN - SCOPUS:85149726016
T3 - OGC 2022 - 7th Optoelectronics Global Conference
SP - 149
EP - 153
BT - OGC 2022 - 7th Optoelectronics Global Conference
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - 7th Optoelectronics Global Conference, OGC 2022
Y2 - 6 December 2022 through 11 December 2022
ER -