title: Ð¡Ð¿Ð¾ÑÐ¾Ð±Ñ Ð¸Ð·Ð¼ÐµÑÐµÐ½Ð¸Ñ Ð´Ð»Ð¸Ð½Ñ Ð±Ð¸ÐµÐ½Ð¸Ð¹ Ð² Ð°Ð½Ð¸Ð·Ð¾ÑÑÐ¾Ð¿Ð½Ð¾Ð¼ Ð¾Ð¿ÑÐ¾Ð²Ð¾Ð»Ð¾ÐºÐ½Ðµ
title: Ð²ÑÐ¿ÑÑÐºÐ½Ð°Ñ ÐºÐ²Ð°Ð»Ð¸ÑÐ¸ÐºÐ°ÑÐ¸Ð¾Ð½Ð½Ð°Ñ ÑÐ°Ð±Ð¾ÑÐ° Ð±Ð°ÐºÐ°Ð»Ð°Ð²ÑÐ°
titleType: Subtitle
title: Methods for measuring the beat length in anisotropic fiber
Creators: name: ÐÐ½Ð´ÑÐµÐµÐ², ÐÑÑÐµÑÐ»Ð°Ð²
Publisher: name: Ð¡Ð°Ð½ÐºÑ-ÐÐµÑÐµÑÐ±ÑÑÐ³ÑÐºÐ¸Ð¹ Ð¿Ð¾Ð»Ð¸ÑÐµÑÐ½Ð¸ÑÐµÑÐºÐ¸Ð¹ ÑÐ½Ð¸Ð²ÐµÑÑÐ¸ÑÐµÑ ÐÐµÑÑÐ° ÐÐµÐ»Ð¸ÐºÐ¾Ð³Ð¾
Year: 2021
Subjects: Ð°Ð½Ð¸Ð·Ð¾ÑÑÐ¾Ð¿Ð¸Ñ
Ð´Ð²ÑÐ»ÑÑÐµÐ¿ÑÐµÐ»Ð¾Ð¼Ð»ÐµÐ½Ð¸Ðµ (ÐÐÐ)
Ð¾Ð¿ÑÐ¸ÑÐµÑÐºÐ¾Ðµ Ð²Ð¾Ð»Ð¾ÐºÐ½Ð¾ (ÐÐ)
Ð¿Ð¾Ð»ÑÑÐ¸Ð·Ð°ÑÐ¸Ñ
Ð´Ð»Ð¸Ð½Ð° Ð±Ð¸ÐµÐ½Ð¸Ð¹
H-Ð¿Ð°ÑÐ°Ð¼ÐµÑÑ
ÑÐ°Ð·Ð¾Ð²Ð°Ñ Ð·Ð°Ð´ÐµÑÐ¶ÐºÐ°
anisotropy
birefringence
optical fiber
polarization
beat length
H-parameter
phase delay

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description: The subject of the graduate qualification work is: "Methods for measuring the beat length in anisotropic fiber". The aim of this work is to develop an improved method for measuring the beat length in an anisotropic optical fiber, based on a local perturbation of two modes of an anisotropic fiber by the roller method. The paper discusses the anisotropic optical fibers, its structure, principle of operation, and how the preservation of the polarization state of the introduced light in such fibers is achieved. The main characteristics of anisotropic optical fibers where the most important is the beat length were investigated. Several methods of measuring the beat length in anisotropic fibers and their disadvantages were studied and analyzed. An improved method for measuring the beat length based on local perturbation of two modes of an anisotropic fiber by the roller method has been developed. An experimental setup was assembled, where the efficiency of the developed method was tested. Experimental results are presented in the form of beat length values for 4 types of anisotropic optical fibers: anisotropic fiber with an elliptical core, anisotropic fiber with an elliptical cladding "Bow-tie" anisotropic fiber, "PANDA" anisotropic fiber. The comparison of the results with theoretical data was presented as well. The developed method for measuring the beat length can be further used to measure the beat length values for various types of anisotropic optical fibers. The subject of research in this work is a model of an experimental setup for measuring the beat length by a method based on local perturbation of two modes of an anisotropic fiber by the roller method, as well as 4 types of anisotropic optical fibers: anisotropic fiber with an elliptical core, an anisotropic fiber with an elliptical cladding, "Bow-tie" anisotropic fiber, "PANDA" anisotropic fiber; The research method is a method for measuring the beat length based on a local perturbation of two modes of an anisotropic fiber by the roller method.