Abstract

An ultra-sensitive sensor, based on two Fabry–Perot interferometers (FPIs), has been realized for temperature and pressure sensing. A polydimethylsiloxane (PDMS)-based FPI₁ was used as a sensing cavity, and a closed capillary-based FPI₂ was used as a reference cavity for its insensitivity to both temperature and pressure. The two FPIs were connected in series to obtain a cascaded FPIs sensor, showing a clear spectral envelope. The temperature and pressure sensitivities of the proposed sensor reach up to 16.51 nm/°C and 100.18 nm/MPa, which are 25.4 and 21.6 times, respectively, larger than these of the PDMS-based FPI₁, showing a great Vernier effect.

© 2023 Optica Publishing Group

Enhanced sensitivity of temperature and magnetic field sensor based on FPIs with Vernier effect

Simiao Duan, Shengli Pu, Xin Lin, Weinan Liu, Zijian Hao, Chencheng Zhang, Jiaqi Fu, and Shufei Han
Opt. Express 32(1) 275-286 (2024)

High-sensitivity fiber optic temperature sensor based on CTFBG-FPI and Vernier effect

Xue-Peng Pan, Cai Sun, Shan-Ren Liu, Bo Wang, Meng-Meng Gao, Qi Guo, Qi-Dai Chen, Hong-Bo Sun, and Yong-Sen Yu
Opt. Lett. 48(15) 3845-3848 (2023)

Highly sensitive optical fiber pressure sensor based on the FPI and Vernier effect via femtosecond laser plane-by-plane writing technology

Xixi Hu, Dan Su, and Xueguang Qiao
Appl. Opt. 63(10) 2658-2666 (2024)

Compact highly sensitive Fabry–Perot temperature and gas pressure sensing probe fabricated by a femtosecond laser and PDMS

Xiping Zhu, Chao Jiang, Huiling Huang, Tingshui Cao, and Simei Sun
Opt. Lett. 48(11) 2973-2976 (2023)

Composite Fabry–Perot interferometric gas pressure and temperature sensor utilizing four hole fiber with sensitivity boosted by high-order harmonic Vernier effect

Ling Chen, Jiajun Tian, Qiang Wu, Jiewen Li, Yong Yao, and Jiawei Wang
Opt. Express 31(15) 24988-25003 (2023)