Digital analysis of a speckle pattern of chaotic mode composition and restoration of a regular intensity pattern after a multimode fiber
Author:
Volyar A.V.1,
Bretsko M.V.1,
Akimova Y.E.1,
Egorov Y.A.1
Affiliation:
1. Physics and Technology Institute of V.I. Vernadsky Crimean Federal University, Academician Vernadsky 4, 295007, Simferopol, Republic of Crimea, Russia
Abstract
A process of mode matching in a chaotic speckle pattern without a reference beam responsible for the formation of a holographic grating was studied experimentally and theoretically. Our approach was based on measuring the amplitudes and phases of the Hermite-Gauss (HG) and Laguerre-Gauss (LG) modes in a speckle pattern formed by the radiation of a multimode gradient fiber. The speckle pattern was formed in a hologram of a spatial light modulator using a multimode gradient fiber model while taking into account the mode and polarization dispersion, as well as random phase jumps of each eigenmode. We managed to match 210 modes of the speckle pattern and restore not only the original pattern, but also each structured LG mode and the entire chain of HG eigenmodes.
Funder
Russian Foundation for Basic Research
Publisher
Samara State National Research University
Subject
Electrical and Electronic Engineering,Computer Science Applications,Atomic and Molecular Physics, and Optics
Cited by
2 articles.
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