Structure design of transmission type multilayer optical fiber hydrogen sensor

Abstract

This article uses an optical fiber hydrogen sensor based on the light-emphasis system. It has a transmissive optical structure, and multiple sensor films can be placed to measure the change in optical performance under a hydrogen environment to improve the signal intensity of light intensity changes. When hydrogen gas contacts the surface of palladium, it is captured and decomposed into hydrogen atoms and enters the interior of the palladium lattice, causing physical properties of the palladium nanoparticles to change, which in turn affects the intensity of transmitted light. However, due to the very small size of the nanoparticles, the resulting changes in optical performance are limited, so this paper uses a multilayer sensitization method to enhance the intensity of the optical signal and improve the performance-to-noise ratio.