Design and simulation of etched physical structure fiber Bragg grating for fabricating high temperature sensors

Abstract

Side-polishing single-mode fiber (SP-SMF) to the D-fiber and etch the physical structure Grating into the polishing flat surface. The simulation results of SP-SMF by COMSOL software show that the electric field contour lines at the air-cladding interface is continuous when the fiber cladding is polished to closer the core. Using Rsoft software to simulate the side-polished and etched fiber Bragg grating（ SP-EFBG） and obtained the structural parameters of SP-EFBG, when the grating period and grating length and grating depth of the simulated SP-EFBG are 775nm and 10000μm and 150nm respectively, obtain the central wavelength and bandwidth and peak reflectivity is 1550nm and 0.2044nm and 90.79% respectively.