Structure optimization of gold-sputtered side-polished U-shaped plastic optical fiber SPR sensor

Abstract

Purpose This study aims to optimize the structure of gold-sputtered U-shaped plastic fiber sensors. Design/methodology/approach A group of U-shaped Au-sputtered plastic optical fiber sensing probes with polishing angles of 45°, 90° and 135° is prepared. Findings The experimental results show that the spectral response and sensitivity of the sensor at 45°polishing angle is twice that of the sensor at 90°. Research limitations/implications Due to the limitations of laboratory temperature and equipment, the overall effect has not reached the ideal, but the expected effect has been obvious. Experiments also optimize the sensor. Practical implications Optical fiber sensing has always been an indispensable part of various fields. Social implications Sensor optimization is of great help to the progress of technology and the development of science and technology. Originality/value The authors have no conflicts of interest to disclose.

Functional refractive-index sensor by internal reflection of diffuse light

“…Many devices have been proposed and studied as RI sensors for rather specific applications. These can be based on fiber optics or integrated optics (Suhadolnik, 2007; Gu et al , 2008; Dai et al , 2008; Harun et al , 2011; Freiner et al , 1995), surface plasmon resonance phenomena and metamaterials (Dyshlyuk, 2010; Liu et al , 2020; Gu et al , 2021) and more. All the latter are more delicate devices with elaborated designs and implementation, and require expensive instrumentation to operate.…”