https://ojs.wiserpub.com/index.php/top/issue/feed 2025-01-17T10:00:32+08:00 TOP Editorial Office editorial-top@wiserpub.com Open Journal Systems <p>Transactions in Optics and Photonics is a comprehensive, open-access, peer-reviewed journal that serves as a platform for researchers, scientists, and engineers to publish their latest findings, advancements and innovations in optics and photonics. It aims to facilitate the sharing of cutting-edge research, theoretical advancements, experimental findings, and practical applications within the field.</p> <p>The topics of the journal are from all areas of optics, including modern optics, quantum optics, nonlinear optics, fiber optics, optical physics, Fourier optics, spectroscopy, ultra-fast optics, X-ray optics, atmospheric optics, oceanic optics, geometrical optics, statistical optics, surface optics, optoelectronics, detectors, diffraction and gratings, paraxial waves, holography, image processing, pattern recognition, polarimetry, microscopy, optical data storage, optical devices, remote sensing, astronomical optics, optical engineering, surface photochemistry and thermal lensing, etc. <span style="font-size: 0.875rem;">Click <a href="https://ojs.wiserpub.com/index.php/TOP/about">here</a> to know more details. </span></p> <p> </p> <p> </p> https://ojs.wiserpub.com/index.php/top/article/view/5432 2024-11-20T16:39:51+08:00 Aneliya Dakova-Mollova anelia.dakova@gmail.com Nikol Gocheva anelia.dakova@gmail.com Valeri Slavchev anelia.dakova@gmail.com Zara Kasapeteva anelia.dakova@gmail.com Diana Dakova anelia.dakova@gmail.com Anjan Biswas anelia.dakova@gmail.com Lubomir Kovachev anelia.dakova@gmail.com

<p>The present paper for the first time it is investigated the generation and formation of amplitude-type vortices, propagating in single-mode optical fibers with step-index profile under the influences of third-order dispersion and selfsteepening effect or so called dispersion of nonlinearity of the medium. The main model includes the vector nonlinear amplitude equation, from which a system of two scalar partial differential equations is derived. They describe the evolution of the x and y components of the vector amplitude function <img src="https://ojs.wiserpub.com/public/site/images/optics/mceclip4.png" /> of an optical pulse under the influences of these higher order nonlinear and dispersive phenomena. New exact analytical solutions of the resulting system of equations were obtained in the form of optical vortices. They have amplitude type singularity and they are observed as ring structures in the components of the laser pulses. Numerical simulations of the found solutions are performed. It is shown that the vortex parameter <em>m</em> is related to the number of these ring structures. Significant depolarization of the vector electric field in the spot of the laser radiation is registered.</p>

2025-01-24T00:00:00+08:00 Copyright (c) 2025 Aneliya Dakova-Mollova, Nikol Gocheva, Valeri Slavchev, Zara Kasapeteva, Diana Dakova, Anjan Biswas, Lubomir Kovachev https://ojs.wiserpub.com/index.php/top/article/view/5454 2024-12-10T09:20:56+08:00 Dragutin T. Mihailović guto@df.uns.ac.rs

<p>One of the most challenging tasks in studying phenomena in nonlinear and quantum optics is determining the contributions of the complexities of individual components to the complexity of the entire system (master complexity). To examine these contributions, we considered this issue using information measures: Kolmogorov derivatives based on Kolmogorov complexity (KC) [KC spectrum, KC plane], change complexity (<em>CC</em>), and Lyapunov exponent (<em>λ</em>). We applied these measures to daily time series measured from 2003 to 2005 in Novi Sad (Serbia) for ultraviolet (UV) radiation, which represents a physical complex system, and water vapor pressure as individual components of that system. Based on the measures applied to UV radiation, we determined: (i) the level of chaos and randomness of the measured time series; (ii) the coordinates of points in the KC plane where master and individual amplitudes interact; and (iii) the range of UV radiation amplitudes in which changes in the interaction between the master and individual amplitudes are most pronounced.</p>

2025-01-17T00:00:00+08:00 Copyright (c) 2025 Dragutin T. Mihailović