Abstract

A highly sensitive fibre-optic nano-displacement sensor based on surface plasmon resonance (SPR) is proposed. The displacement sensing head consists of a single-mode fibre (SMF) with a plasmonic facet and a cladding partly removed single-mode fibre (CPR-SMF) with an air gap. The gold film is deposited on the end of the SMF instead of the flat of the CPR-SMF. The simulation results show that the SPR transmission spectrum shifts significantly toward shorter wavelengths with widening displacement. The relationship between SPR transmission wavelength and the displacement is sinusoidal, and the sensitivity of the proposed sensor can be as high as 31.45 nm/nm. The performance of the proposed sensor can be optimized by choosing a favourable combination of the gold film thickness of 40 to 50 nm and a residual cladding thickness of 100 to 150 nm. Because of the high sensitivity and compact configuration, it is feasible to achieve high sensitivity nano or angstrom displacement measurement and control.

© 2016 IEEE

Highly sensitive dual-core photonic crystal fiber based on a surface plasmon resonance sensor with a silver nano-continuous grating

Shengxi Jiao, Sanfeng Gu, Hanrui Yang, Hairui Fang, and Shibo Xu
Appl. Opt. 57(28) 8350-8358 (2018)

Surface plasmon resonance sensor composed of micro-nano optical fibers for high-sensitivity refractive index detection

Haihao Fu, Chao Liu, Luhui Xu, Wei Liu, Jingwei Lv, Jianxin Wang, Jie He, Xingdi Luo, and Paul K. Chu
J. Opt. Soc. Am. A 40(12) 2177-2186 (2023)

Surface plasmon resonance-based highly sensitive optical touch sensor with a hybrid noise rejection scheme

Sarun Sumriddetchkajorn and Kosom Chaitavon
Appl. Opt. 45(1) 172-177 (2006)

Highly sensitive surface plasmon resonance temperature sensor based on a hollow core fiber multilayer structure

Qi Zhang, Hailian Liu, Taotao Hu, Bin Li, Xuenan Zhang, Fang Wang, Zheng Liu, and Tonglei Cheng
Opt. Express 31(15) 23840-23850 (2023)

Surface plasmon resonance hydrogen sensor based on metallic grating with high sensitivity

Kaiqun Lin, Yonghua Lu, Junxue Chen, Rongsheng Zheng, Pei Wang, and Hai Ming
Opt. Express 16(23) 18599-18604 (2008)