Dynamics of the Self-Action of Wave Fields in Multicore Fibers

IF 0.8 4区 地球科学 Q4 ENGINEERING, ELECTRICAL & ELECTRONIC Radiophysics and Quantum Electronics Pub Date : 2024-03-27 DOI:10.1007/s11141-024-10302-1
A. A. Balakin, S. A. Skobelev, A. V. Andrianov, A. G. Litvak
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Abstract

We review modern studies of the self-action of laser radiation in discrete systems using the example of multicore fibers. The critical power is shown to exist, at which the self-trapping (the discrete analog of collapse) of radiation occurs even in a one-dimensional lattice of weakly coupled cores. The transition of nonlinear dynamics to the stochastic regime in discrete systems is studied, and the threshold amplitude for this transition is determined. It is shown that the use of a special configuration with a dedicated core in the center of a ring of identical cores makes it possible to control the self-trapping process and apply it for nonlinear radiation filtering and self-compression of laser pulses. It is established that arbitrarily powerful coherent radiation can be handled using stable out-of-phase supermodes, which are wave-field distributions over all fiber cores with a maximum propagation constant. Such out-of-phase supermodes are demonstrated for core configurations shaped as a ring, a line, a square matrix, and a hexagonal structure. The first experiments have already shown the feasibility and stability of the found out-of-phase supermodes, in both fibers with a ring configuration and fibers having a square matrix of cores.

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多芯光纤中的波场自作用动力学
我们以多芯光纤为例,回顾了离散系统中激光辐射自作用的现代研究。临界功率被证明是存在的,在此临界功率下,即使在弱耦合纤芯的一维晶格中也会发生辐射的自捕获(离散塌缩的类似物)。研究了离散系统中非线性动力学向随机机制的过渡,并确定了这种过渡的阈值振幅。研究表明,在相同磁芯环的中心使用专用磁芯的特殊配置可以控制自捕获过程,并将其应用于非线性辐射滤波和激光脉冲的自压缩。实验证明,可以利用稳定的失相超模处理任意强大的相干辐射,失相超模是指所有光纤纤芯上的波场分布都具有最大传播常数。这种失相超模适用于环形、线形、方形矩阵和六角形结构的纤芯配置。首批实验已经表明,在环形结构的光纤和具有方形矩阵纤芯的光纤中,所发现的失相超模均具有可行性和稳定性。
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来源期刊
Radiophysics and Quantum Electronics
Radiophysics and Quantum Electronics ENGINEERING, ELECTRICAL & ELECTRONIC-PHYSICS, APPLIED
CiteScore
1.10
自引率
12.50%
发文量
60
审稿时长
6-12 weeks
期刊介绍: Radiophysics and Quantum Electronics contains the most recent and best Russian research on topics such as: Radio astronomy; Plasma astrophysics; Ionospheric, atmospheric and oceanic physics; Radiowave propagation; Quantum radiophysics; Pphysics of oscillations and waves; Physics of plasmas; Statistical radiophysics; Electrodynamics; Vacuum and plasma electronics; Acoustics; Solid-state electronics. Radiophysics and Quantum Electronics is a translation of the Russian journal Izvestiya VUZ. Radiofizika, published by the Radiophysical Research Institute and N.I. Lobachevsky State University at Nizhnii Novgorod, Russia. The Russian volume-year is published in English beginning in April. All articles are peer-reviewed.
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