Capillary encapsulated reflective fiber optic SPR temperature sensor

Abstract

A capillary encapsulated fiber optic surface plasmon resonance (SPR) temperature sensor was prepared and analyzed in this paper. The properties of sensors with different filling materials and different capillaries were measured and compared. Finally, polydimethylsiloxane was selected as the filling material and the brass tube was selected as the encapsulated capillary for temperature sensing. Experimental results demonstrated that the sensitivity of the fiber optic SPR temperature sensor could be −1.87 nm °C−1, and the sensor showed good stability, reliable repeatability, and good reversibility. In addition, the encapsulation of the sensor with brass capillary tube also enhanced the protection of the sensor probe and improved the mechanical strength of the sensor, so that it can be well applied in practical measurement.

Hybridized Nanogenerators for Multifunctional Self-Powered Sensing: Principles, Prototypes, and Perspectives

“…The major function of sensors is to probe information about the environment or objects and transmit that information to the background through the network for processing ( Potyrailo, 2016 ; Mikusz et al., 2015 ; Ferrandez-Pastor et al., 2016 ). Enormous efforts have been devoted to the development of various sensors such as response to the motion ( Liu et al., 2018 ), pressure ( Ruth et al., 2020 ), temperature ( E et al., 2019 ), humidity ( Duan et al., 2019 ), chemical ( Grover and Lall, 2020 ), etc. However, the IoTs is an extremely complex system especially considering the connection of human, machine, and environmental surroundings.…”