title: ÐÐ¾Ð»Ð¾ÐºÐ¾Ð½Ð½Ð¾-Ð¾Ð¿ÑÐ¸ÑÐµÑÐºÐ¸Ð¹ Ð´Ð°ÑÑÐ¸Ðº Ð¸Ð·Ð³Ð¸Ð±Ð° Ð½Ð° Ð¾ÑÐ½Ð¾Ð²Ðµ Ð¼ÐµÐ¶Ð¼Ð¾Ð´Ð¾Ð²Ð¾Ð³Ð¾ Ð¸Ð½ÑÐµÑÑÐµÑÐ¾Ð¼ÐµÑÑÐ° Ñ Ð¾Ð´Ð½Ð¾Ð¼Ð¾Ð´Ð¾Ð²ÑÐ¼ Ð¿Ð¾Ð´ÐºÐ»ÑÑÐµÐ½Ð¸ÐµÐ¼
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: Fiber optic bend sensor based on intermode interferometer with single-mode connection
Creators: name: ÐÐ°Ð²Ð°Ð»Ð¸ÑÐ¸Ð½Ð°, ÐÑÐ±Ð¾Ð²Ñ
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: 2023
Subjects: Ð¼ÐµÐ¶Ð¼Ð¾Ð´Ð¾Ð²ÑÐ¹ Ð²Ð¾Ð»Ð¾ÐºÐ¾Ð½Ð½Ð¾-Ð¾Ð¿ÑÐ¸ÑÐµÑÐºÐ¸Ð¹ Ð¸Ð½ÑÐµÑÑÐµÑÐ¾Ð¼ÐµÑÑ
Ð¼Ð½Ð¾Ð³Ð¾Ð¼Ð¾Ð´Ð¾Ð²ÑÐ¹ ÑÐ²ÐµÑÐ¾Ð²Ð¾Ð´
Ð¿Ð¾ÑÑÐ¾ÑÐ½Ð½ÑÐµ ÑÐ°ÑÐ¿ÑÐ¾ÑÑÑÐ°Ð½ÐµÐ½Ð¸Ñ
ÑÐ¿ÐµÐºÑÑÐ°Ð»ÑÐ½ÑÐ¹ Ð¾Ð¿ÑÐ¾Ñ
Ð¸Ð·Ð³Ð¸Ð±
intermode fiber-optic interferometer
multimode lightguide
propagation constants
spectral
survey
bending

description: ÐÐ±ÑÐµÐºÑ Ð¸ÑÑÐ»ÐµÐ´Ð¾Ð²Ð°Ð½Ð¸Ñ â Ð¼ÐµÐ¶Ð¼Ð¾Ð´Ð¾Ð²ÑÐ¹ Ð²Ð¾Ð»Ð¾ÐºÐ¾Ð½Ð½ÑÐ¹ Ð¸Ð½ÑÐµÑÑÐµÑÐ¾Ð¼ÐµÑÑ Ñ Ð¾Ð´Ð½Ð¾Ð¼Ð¾Ð´Ð¾Ð²ÑÐ¼ Ð¿Ð¾Ð´ÐºÐ»ÑÑÐµÐ½Ð¸ÐµÐ¼. Ð¦ÐµÐ»Ñ ÑÐ°Ð±Ð¾ÑÑ â Ð¸ÑÑÐ»ÐµÐ´Ð¾Ð²Ð°Ð½Ð¸Ðµ ÑÐ¿ÐµÐºÑÑÐ°Ð»ÑÐ½Ð¾Ð¹ Ð¿ÐµÑÐµÐ´Ð°ÑÐ¾ÑÐ½Ð¾Ð¹ ÑÑÐ½ÐºÑÐ¸Ð¸ Ð¼ÐµÐ¶Ð¼Ð¾Ð´Ð¾Ð²Ð¾Ð³Ð¾ Ð¸Ð½ÑÐµÑÑÐµÑÐ¾Ð¼ÐµÑÑÐ° Ñ Ð¾Ð´Ð½Ð¾Ð¼Ð¾Ð´Ð¾Ð²ÑÐ¼ Ð¿Ð¾Ð´ÐºÐ»ÑÑÐµÐ½Ð¸ÐµÐ¼ Ð¿ÑÐ¸ ÐµÐ³Ð¾ Ð¸Ð·Ð³Ð¸Ð±Ðµ. Ð Ð¿ÑÐ¾ÑÐµÑÑÐµ ÑÐ°Ð±Ð¾ÑÑ Ð±ÑÐ»Ð¾ Ð¿ÑÐ¾Ð²ÐµÐ´ÐµÐ½Ð¾ ÑÐ¸ÑÐ»ÐµÐ½Ð½Ð¾Ðµ Ð¼Ð¾Ð´ÐµÐ»Ð¸ÑÐ¾Ð²Ð°Ð½Ð¸Ðµ Ð² Ð¿ÑÐ¾Ð³ÑÐ°Ð¼Ð¼Ðµ COMSOL Multiphysics Ð¼Ð½Ð¾Ð³Ð¾Ð¼Ð¾Ð´Ð¾Ð²Ð¾Ð³Ð¾ Ð¸ Ð¾Ð´Ð½Ð¾Ð¼Ð¾Ð´Ð¾Ð²Ð¾Ð³Ð¾ ÑÐ²ÐµÑÐ¾Ð²Ð¾Ð´Ð¾Ð² Ð² Ð±Ð¾Ð»ÑÑÐ¾Ð¼ Ð´Ð¸Ð°Ð¿Ð°Ð·Ð¾Ð½Ðµ Ð·Ð½Ð°ÑÐµÐ½Ð¸Ð¹ ÐºÑÐ¸Ð²Ð¸Ð·Ð½Ñ Ð¸Ð·Ð³Ð¸Ð±Ð° Ð¾Ñ 0 Ð´Ð¾ 100 Ð¼-1 . Ð Ð°ÑÑÐ¼Ð¾ÑÑÐµÐ½Ð¾ Ð²Ð»Ð¸ÑÐ½Ð¸Ðµ Ð¸Ð·Ð³Ð¸Ð±Ð° Ð¼Ð½Ð¾Ð³Ð¾Ð¼Ð¾Ð´Ð¾Ð²Ð¾Ð³Ð¾ Ð²Ð¾Ð»Ð¾ÐºÐ½Ð° Ð½Ð° Ð¿Ð°ÑÐ°Ð¼ÐµÑÑÑ LP0p Ð¼Ð¾Ð´. ÐÑÐ¿Ð¾Ð»Ð½ÐµÐ½ ÑÐ¸ÑÐ»ÐµÐ½Ð½ÑÐ¹ ÑÐ°ÑÑÐµÑ ÑÐ¿ÐµÐºÑÑÐ°Ð»ÑÐ½Ð¾Ð¹ Ð¿ÐµÑÐµÐ´Ð°ÑÐ¾ÑÐ½Ð¾Ð¹ ÑÑÐ½ÐºÑÐ¸Ð¸ Ð¸ ÐµÐµ Ð¾Ð±ÑÐ°Ð±Ð¾ÑÐºÐ° Ð¿ÑÐ¸ Ð¿Ð¾Ð¼Ð¾ÑÐ¸ Ð´Ð¸ÑÐºÑÐµÑÐ½Ð¾Ð³Ð¾ Ð¿ÑÐµÐ¾Ð±ÑÐ°Ð·Ð¾Ð²Ð°Ð½Ð¸Ñ Ð¤ÑÑÑÐµ Ð² Ð¿ÑÐ¾Ð³ÑÐ°Ð¼Ð¼Ðµ MATLAB. ÐÐ¾ÐºÐ°Ð·Ð°Ð½Ð¾, ÑÑÐ¾ Ð·Ð°Ð²Ð¸ÑÐ¸Ð¼Ð¾ÑÑÐ¸ Ð¸Ð·Ð¼ÐµÐ½ÐµÐ½Ð¸Ñ ÑÐ°ÑÑÐ¾Ñ Ð¸Ð½ÑÐµÑÑÐµÑÐµÐ½ÑÐ¸Ð¾Ð½Ð½ÑÑ ÐºÐ¾Ð¼Ð¿Ð¾Ð½ÐµÐ½Ñ Ð¿ÐµÑÐµÐ´Ð°ÑÐ¾ÑÐ½Ð¾Ð¹ ÑÑÐ½ÐºÑÐ¸Ð¸ Ð¸Ð¼ÐµÑÑ ÑÐ»Ð¾Ð¶Ð½ÑÐ¹ Ð½ÐµÐ»Ð¸Ð½ÐµÐ¹Ð½ÑÐ¹ ÑÐ°ÑÐ°ÐºÑÐµÑ Ð¸ Ð¼Ð¾Ð³ÑÑ Ð¿ÐµÑÐµÑÐ¾Ð´Ð¸ÑÑ ÑÐµÑÐµÐ· Ð½Ð¾Ð»Ñ. ÐÑÐ¾Ð²ÐµÐ´ÐµÐ½Ð¾ ÑÐºÑÐ¿ÐµÑÐ¸Ð¼ÐµÐ½ÑÐ°Ð»ÑÐ½Ð¾Ðµ Ð¸ÑÑÐ»ÐµÐ´Ð¾Ð²Ð°Ð½Ð¸Ðµ Ð¸Ð·Ð¾Ð³Ð½ÑÑÐ¾Ð³Ð¾ Ð¸Ð½ÑÐµÑÑÐµÑÐ¾Ð¼ÐµÑÑÐ°, Ñ Ð¿Ð¾Ð¼Ð¾ÑÑÑ ÐºÐ¾ÑÐ¾ÑÐ¾Ð³Ð¾ Ð±ÑÐ»Ð¸ Ð¿Ð¾Ð´ÑÐ²ÐµÑÐ¶Ð´ÐµÐ½Ñ ÑÐ¸ÑÐ»ÐµÐ½Ð½ÑÐµ ÑÐ°ÑÑÐµÑÑ. ÐÑÐ¸ÑÐµÐ¼ Ð¿ÑÐ¸ Ð½ÐµÐ±Ð¾Ð»ÑÑÐ¸Ñ Ð¸Ð·Ð³Ð¸Ð±Ð°Ñ ÑÐºÑÐ¿ÐµÑÐ¸Ð¼ÐµÐ½ÑÐ°Ð»ÑÐ½ÑÐµ ÑÐµÐ·ÑÐ»ÑÑÐ°ÑÑ ÑÐ¾ÑÐ¾ÑÐ¾ ÑÐ¾Ð²Ð¿Ð°Ð´Ð°ÑÑ Ñ ÑÐ¸ÑÐ»ÐµÐ½Ð½ÑÐ¼Ð¸ ÑÐ°ÑÑÐµÑÐ°Ð¼Ð¸, Ð° Ð¿ÑÐ¸ Ð±Ð¾Ð»ÑÑÐ¸Ñ Ð¸Ð·Ð³Ð¸Ð±Ð°Ñ Ð¿Ð¾ÑÐ²Ð»ÑÑÑÑÑ Ð¾ÑÐ»Ð¸ÑÐ¸Ñ Ð² ÑÐ²ÑÐ·Ð¸ Ñ Ð²Ð¾Ð·Ð±ÑÐ¶Ð´ÐµÐ½Ð¸ÐµÐ¼ Ð½ÐµÐ¾ÑÐµÑÐ¸Ð¼Ð¼ÐµÑÑÐ¸ÑÐ½ÑÑ Ð¼Ð¾Ð´, Ð½Ðµ ÑÑÑÐµÐ½Ð½ÑÑ Ð² Ð¼Ð¾Ð´ÐµÐ»Ð¸. ÐÑÐ¿Ð¾Ð»ÑÐ·Ð¾Ð²Ð°Ð»Ð¸ÑÑ Ð¾ÑÐºÑÑÑÑÐµ Ð¾Ð±ÑÐ°Ð·Ð¾Ð²Ð°ÑÐµÐ»ÑÐ½ÑÐµ ÑÐµÑÑÑÑÑ Ð¸ Ð¿ÑÐ¾Ð³ÑÐ°Ð¼Ð¼Ñ Ð¿Ð¾Ð¸ÑÐºÐ° Ð¸ Ð°Ð½Ð°Ð»Ð¸Ð·Ð° Ð¸Ð½ÑÐ¾ÑÐ¼Ð°ÑÐ¸Ð¸. ÐÑÐ¿Ð¾Ð»ÑÐ·Ð¾Ð²Ð°Ð»Ð¸ÑÑ ÑÑÐµÐ´ÑÑÐ²Ð° Ð°Ð²ÑÐ¾Ð¼Ð°ÑÐ¸Ð·Ð°ÑÐ¸Ð¸ (Ð°Ð²ÑÐ¾Ð¼Ð°ÑÐ¸Ð·Ð¸ÑÐ¾Ð²Ð°Ð½Ð½Ð¾Ð¹) ÑÐ°Ð·ÑÐ°Ð±Ð¾ÑÐºÐ¸: Ð¸Ð½ÑÐµÑÑÐ¾Ð³Ð°ÑÐ¾Ñ NI PXIe-4844 Ñ Ð¾Ð±ÑÐ°Ð±Ð¾ÑÐºÐ¾Ð¹ ÑÐµÐ·ÑÐ»ÑÑÐ°ÑÐ¾Ð² Ð¸Ð·Ð¼ÐµÑÐµÐ½Ð¸Ñ Ð½Ð° ÐºÐ¾Ð¼Ð¿ÑÑÑÐµÑÐµ. ÐÑÐ¸Ð¼ÐµÐ½ÐµÐ½Ð¾ (Ð¿ÑÐ¾ÑÐµÑÑÐ¸ÑÐ¾Ð²Ð°Ð½Ð¾) Ð¿ÑÐ¾Ð³ÑÐ°Ð¼Ð¼Ð½Ð¾Ðµ Ð¾Ð±ÐµÑÐ¿ÐµÑÐµÐ½Ð¸Ðµ: MATLAB, COMSOL Multiphysics.
description: The subject of the research is an intermode fiber-optic interferometer with a single-mode connection. The aim of the work is to investigate the spectral transfer function of an intermode interferometer with a single-mode connection when it is bent. Numerical simulation in the program COMSOL Multiphysics of multimode and single-mode light guides in a large range of bending curvature values from 0 to 100 m-1 was carried out. The influence of multimode fiber bending on the parameters of LP0p modes is considered. Numerical calculation of the spectral transfer function and its processing by means of the discrete Fourier transform in the MATLAB program are performed. It is shown that the dependences of the frequency changes of the interference components of the transfer function have a complex nonlinear character and can go through zero. An experimental study of the bent interferometer was carried out, with the help of which the numerical calculations were confirmed. At small bends the experimental results coincide well with the numerical calculations, while at large bends differences appear due to the excitation of non-axisymmetric modes not taken into account in the model. Open educational resources and programs of information search and analysis were used. The means of automation (automated) development were used: NI PXIe-4844 interrogator with computer processing of measurement results. Used (tested) software: MATLAB, COMSOL Multiphysics.