Abstract

Herein we propose and experimentally demonstrate a hyperelastic polymer (polydimethylsiloxane, PDMS) fiber Fabry-Perot interferometer (FPI) for nanoforce measurement. The femtosecond laser pulse illumination and slit beam shaping are utilized to form refractive index modulation as the reflection mirrors of the FPI in the fiber. The PDMS fiber FPI, which exhibits an ultra-low Young's modulus, can be stretched by applied microforce and further result in the spectral variation of the FPI. In the measurement, another matching FPI is employed to introduce the optical Vernier effect. Due to the hyperelastic performance of the PDMS fiber and the magnification of the Vernier effect, the proposed sensor has force sensitivity as high as 45.721 nm μN⁻¹ within linearly elastic range from 0 to 1400 μN. The proposed sensor is easily fabricated, assembled, and very stable, and it has therefore the potential to be a beneficial sensing technique for biochemical analysis and materials science.

Hybrid Vernier effect: sensitivity amplification and two-parameter measurement in cascaded Fabry-Perot interferometer fiber sensor

Cheng Zhou, Jiajun Tian, and Yong Yao
Opt. Express 31(25) 41701-41712 (2023)

Simultaneous measurement of pressure and temperature by employing Fabry-Perot interferometer based on pendant polymer droplet

Bing Sun, Yiping Wang, Junle Qu, Changrui Liao, Guolu Yin, Jun He, Jiangtao Zhou, Jian Tang, Shen Liu, Zhengyong Li, and Yingjie Liu
Opt. Express 23(3) 1906-1911 (2015)

Highly sensitive PDMS-filled Fabry–Perot interferometer temperature sensor based on the Vernier effect

Leyi Hou, Chunliu Zhao, Ben Xu, Bangning Mao, Changyu Shen, and D. N. Wang
Appl. Opt. 58(18) 4858-4865 (2019)

Cascaded Fabry-Perot interferometer-regenerated fiber Bragg grating structure for temperature-strain measurement under extreme temperature conditions

Qin Tian, Guoguo Xin, Kok-Sing Lim, Yudong He, Ji Liu, Harith Ahmad, Xiaochong Liu, and Hangzhou Yang
Opt. Express 28(21) 30478-30488 (2020)

Sapphire derived fiber based Fabry-Perot interferometer with an etched micro air cavity for strain measurement at high temperatures

Penghao Zhang, Li Zhang, Zhongyu Wang, Xinying Zhang, and Zhendong Shang
Opt. Express 27(19) 27112-27123 (2019)