Dispersion of optical vortices in twisted elliptical-core optical fibers with torsional stresses

被引：0
|
作者：
Lapin, B. P. [1 ]
Barshak, E. V. [1 ]
Vikulin, D. V. [1 ]
Alexeyev, C. N. [1 ]
Yavorsky, M. A. [1 ]
机构：
[1] VI Vernadsky Crimean Federal Univ, Prospekt Vernadskogo 4, Simferopol 295000, Russia
来源：
COMPUTER OPTICS | 2024年 / 48卷 / 01期
基金：
俄罗斯科学基金会;
关键词：
optical fiber; torsional mechanical stresses; dispersion; optical vortex; POLARIZATION-MODE-DISPERSION; ORDER MODES; COMPENSATION; TRANSMISSION;
D O I：
10.18287/2412-6179-CO-1340
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
In this paper, the dispersion of optical vortices (OVs) with a topological charge l >= 1 in twisted elliptical fibers (TEF) with torsional stresses (TS) is studied. Analytical expressions for polarization, topological, and hybrid dispersion are derived from the spectra of vortex modes in step-and gradient-index TEFs with TS. It is shown that in strongly twisted fibers with a gradient refractive index profile, new types of dispersion appear in comparison with the case of a step-index profile. The dependence of the dispersion of OVs on the material and geometrical parameters of the fiber is studied numerically. It is established that in step-index TEFs with TS, there is a spectral region near which all types of dispersion for OVs with l >= 1 take a near zero value. It is also demonstrated that for TEFs with a gradient profile, this regime is realized for strongly twisted strongly elliptical fibers.
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页码：53 / 60
页数：9
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