Showing papers in "Optik in 2020"

TL;DR: In this paper, a method for finding exact solutions in the form of a solitary wave for nonlinear differential equations is presented, which has significant advantages over other approaches of this type.

TL;DR: In this paper, a nonlinear fourth-order equation for describing the pulse propagation in an optical fiber is considered, which generalizes a number of well-known mathematical models in nonlinear media.

TL;DR: In this paper, the generalized nonlinear eighth-order Schrodinger equation with third, fifth, seventh and ninth power of nonlinearity is studied for describing the pulse propagation in optical fiber.

TL;DR: A new algorithm named as Slime Mould Algorithm (SMA) is presented for the solar cell estimation, which has a new feature called as an exceptional mathematical model with adaptive weights to simulate negative and positive feedback of the propagation wave to find the best path for attaching food with an excellent exploitation tendency and exploratory capacity.

TL;DR: In this paper, the essential optical properties and parameters, of thin-film samples of quaternary Ge15-xSbxSe50Te35 glassy matrices 0 ≤ x ≤ 15 a t. w t. % such as: the single effective oscillatordispersion parameters, dielectric characteristics and some non-linear optical constants.

TL;DR: In this paper, the generalized third-order nonlinear Schrodinger (GTONLS) equation is used to model ultra-short pulses in optical fibers and the analysis is carried out systematically by adopting a complex transformation for reducing the GTONLS equation to a couple of nonlinear ordinary differential equations with specific conditions such that the resulting NLODEs can be solved through the use of well-designed techniques such as the expa-function and unified methods.

TL;DR: The obtained results show that the approach offers good imperceptibility and generates watermarking images robust against various attacks with a high-quality watermark.

TL;DR: In this article, a proposed compensation simulation model to handle not only chromatic dispersion but also polarization mode dispersion (PMD) simultaneously is presented. And the model is designed to analyze and simulate dispersion compensation technique which is based on deploying both fiber Bragg grating and emulator together till 250 km long of optical fiber.

TL;DR: In this article, the authors used leaves extract of Citrofortunella microcarpa (Calamondin) for synthesis of copper oxide nanoparticles (CuO-NPs) as a green and environment friendly as reducing agent as well as capping agents.

TL;DR: In this article, soliton solutions to the generalized nonautonomous nonlinear Schrodinger equations (with time-dependent coefficients) via the sine-Gordon expansion method have been presented.

TL;DR: In this article, the first integrals of equations corresponding to the real and imaginary parts are presented, and by means of these integrals the nonlinear first-order differential equation is given.

TL;DR: In this article, a wave variable transformation is first utilized for reducing the Biswas-Arshed equation with the beta time derivative to a nonlinear ODE of integer order; then, optical solitons and other solutions of the model are retrieved by adopting the Jacobi and Kudryashov methods.

TL;DR: In this paper, the optical properties of undoped ZnO and Boron doped (B-ZnO) thin films prepared by sol-gel dip coating technique were investigated.

TL;DR: In this paper, the dynamics of solitons in the perturbed Gerdjikov-Ivanov (PGI) equation is explored by considering particular transformations and exerting newly well-established methods to obtain optical solITons of the model.

TL;DR: From the results, it can be judged that the proposed algorithms are more suitable for the estimation of three types of solar PV models effectively.

TL;DR: In this paper, the Jacobi elliptic functions were found to degenerate to bright, dark, singular and other solitary wave solutions with Kerr law and dual power law nonlinearities.

TL;DR: This study investigates a discrete analogy of tempered fractional calculus on an isolated time scale and provides a new kind of discrete fractionalculus that has useful properties and discrete Mittag–Leffler functions derived.

TL;DR: A surface plasmon resonance biosensor comprising of BK7 prism, MXene, transition metal dichalcogenides (TMDCs), black phosphorus (BP), and gold (Au) is proposed for sensing application in visible region as discussed by the authors.

TL;DR: In this article, the geometric evolution of a linearly polarized light wave coupling into an optical fiber and the rotation of the polarization plane in a 3D Riemannian manifold is discussed.

TL;DR: In this article, the Sasa-Satsuma (SS) equation describing the propagation of short light pulses is derived in the presence of the beta-derivatives, and the dynamics of soliton solutions in the monomode optical fibers is analyzed for different values of the parameter β.

TL;DR: In this paper, ZnAl2O4@ZnO nanocomposite (NC) was synthesized using tragacanth gel as a biotemplate source by the green sol-gel method.

TL;DR: In this paper, the structural, morphological, elemental, chemical bonding and optical properties of simple sol-gel synthesized Al-doped ZnO and Mn-substituted Al-Doped ZNO nanoparticles (NPs) were investigated using XRD, FE-SEM, EDAX, FT-IR and DRS techniques, respectively.

TL;DR: In this paper, the authors analyzed the geometric phase concerning the Heisenberg ferromagnetic version with directional geometric flows of quasi binormal magnetic particles by applying the quasi frame in space.

TL;DR: In this paper, the authors review the current state of research and progress from different perspectives of the SLM, SLM parameters, metallurgical process and microstructure evolution, meetingallurgical defects and mechanical properties as well as corrosion properties in order to provide a basis for follow-on research that leads to the development of high productivity.

TL;DR: In this article, the authors investigated the Fokas-Lenells (FL) equation that describes the soliton dynamics precisely in waveguides by utilizing a traveling wave hypothesis for reducing the FL equation and handling the resulting ODE using the e x p a and Jacobi elliptic function methods.

TL;DR: A series of simulation results prove that this presented algorithm not only satisfies the invisibility of watermarking algorithm, but also makes good performance of robustness, security and embedding capacity.

TL;DR: In this paper, a tapered optical fiber structure based glucose sensor using graphene oxide (GO) and gold nanoparticles (AuNPs) is presented, which is highly sensitive for the detection of glucose concentrations in human bodies with a sensitivity of 1.06 nm/mM in the linear range of 0 mM-11 mM with the autocorrelation accuracy of 0.9386.

TL;DR: In this article, the impact of replacing Cd on the account of Zn of ternary chalcogenide CdxZe1-xSe (0.1.0) films was studied.

TL;DR: In this paper, a series of glass samples based on the concentration of bismuth oxide with the following compositions (90-x) TeO2 -10B2O3 -xBi2O 3 were designed and assembled using the melt quenching technique.

TL;DR: In this paper, the Gaussian process regression (GPR) model is developed to elucidate the statistical relationship among the lattice parameters, grain size, and energy bandgap for doped-ZnO films.