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Abstract

This article discusses the signal delay during transmission over a fiber-optic communication line and ways to reduce group delays at high transmission speeds using Bragg gratings. The contradiction between the need to transmit signals over fiber-optic communication lines and the resulting dispersion and group delay gives rise to the problem of developing the necessary calculation of the parameters of Bragg grids. The aim of the study is to reduce the variance by determining the corresponding parameters of Bragg's lattice. There are a number of structures of fiber-optic Bragg gratings, for example, short-period and long-period gratings, slanted gratings, and alternating-period gratings with variable chirps. Variable-period gratings are used in optical networks, mainly to compensate for dispersion. The production of changeable-period (chirp) gratings consists of the narrowing and bending of the optical fiber during the application process and the linear stretching of the phase mask obtained by heating. In the production of the grid, chirp phase masks with a variable period are also used.