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All Journal Jurnal Fisika Unand Jurnal Penelitian Pendidikan IPA (JPPIPA) Jurnal Ilmu Fisika
Zulfi Abdullah
Laboratorium Fisika Teori Dan Nuklir, Jurusan Fisika, FMIPA, Universitas Andalas
Agriculture, Biological Sciences & Forestry Astronomy Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Earth & Planetary Sciences Education Electrical & Electronics Engineering Energy Materials Science & Nanotechnology Physics

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The Bilinear Formula in Soliton Theory of Optical Fibers Nando Saputra; Ahmad Ripai; Zulfi Abdullah
Jurnal Fisika Unand Vol 11, No 3 (2022)
Publisher : Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (412.013 KB) | DOI: 10.25077/jfu.11.3.387-392.2022

Abstract

Solitons are wave phenomena or pulses that can maintain their shape stability when propagating in a medium. In optical fibers, they become general solutions of the Non-Linear Schrödinger Equation (NLSE). Despite its mathematical complexity, NLSE has been an interesting issue. Soliton analysis and mathematical techniques to solve problems of the equation keep doing. Yan Chen (2022) introduced them based on bilinear formula for the case of the generalized NLSE extended models into third and fourth-order dispersions and cubic-quintic nonlinearity. In this paper, we review the form of the bilinear formula for the case. We re-observed a one-soliton solution based on the formula and verified the work of the last researcher. Here, the mathematical parameters of position α(0) and phase η are verified to become features of change in horizontal position and phase of one soliton in the (z, t) plane during propagation. In addition, we notice the soliton has established stability. Finally, for the condition Kerr effect focusing or the group velocity dispersion β2 more dominates, we present like the soliton trains in optical fibers under modulation instability of plane wave.
An Exact Solution of Nonlinear Schrödinger Equation in a Lossy Fiber System Using Direct Solution Method Zulfi Abdullah; Trengginas Eka Putra Sutantyo; Mahdhivan Syafwan; Ahmad Ripai; Hanifah Azzaura Musyayyadah; Mohamad Nazri Abdul Halif
Jurnal Ilmu Fisika Vol 15 No 1 (2023): March 2023
Publisher : Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/jif.15.1.13-21.2023

Abstract

We present an exact solution of the nonlinear Schrödinger equation (NLSE) for beam propagation in nonlinear fiber optics. It is a lossy fiber system with the beam as solitons. Fiber losses are understood to reduce the peak power of solitons along the fiber length. That is due to its value depending on the fiber attenuation constant of α. Considering fiber loss features on the equation, we write one set modification of the NLSE and make models the main topic of our work. We solved the model and found a straightforward analytical solution of modified NLSE for the system via the direct solution method. To the best of our knowledge, no literature has presented such as solution yet. By substituting them into equations, we validate solutions. It is valid as an exact solution to the NLSE. Lastly, we found a solution offering soliton propagation suitable for the system under study.
Enhancement of Light Absorption in the Active Layer of Organic Solar Cells using Ag:SiO2 Core-Shell Nanoparticles Fahendri Fahendri; Ilham Perdana; Zulfi Abdullah; Mulda Muldarisnur
Jurnal Penelitian Pendidikan IPA Vol 8 No 6 (2022): December
Publisher : Postgraduate, University of Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jppipa.v8i6.2393

Abstract

Organic solar cells still suffer from relatively low conversion efficiency despite significant progress. An Ag:SiO2 core-shell nanoparticle embedded inside the active layer of an organic solar cell is expected to enhance light absorption. Light absorption within the active layer consisting of 70 nm thickness PEDOT: PSS and P3HT: PCBM was calculated using the finite element method for a variable diameter of the silver core, the thickness of the SiO2 shell, and the relative position of nanoparticle inside the active layer. The diameter of the Ag nanoparticle varies from 20 to 50 nm, the thickness of SiO2 varies from 1 to 4 nm, and the position was shifted vertically to 70 nm. The maximum light absorption in the active layer is obtained for silver nanoparticles with a diameter of 40 nm and a SiO2 thickness of 1 nm. The optimum position of the core-shell nanoparticle was found to be not at the interface between the PEDOT: PSS and P3HT: PCBM layers but a little bit shifted down into P3HT: PCBM layer. The highest increase of light absorption, compared to without Ag:SiO2, is 210%, much higher than reported in the literature. Increasing absorption is related to the excitation of surface plasmon resonance of Ag:SiO2 nanoparticles leading to the local field and scattering enhancement in the active layer of the organic solar cell
Co-Authors Ahmad Ripai Ahmad Ripai Ahmad Ripai Anak Agung Istri Sri Wiadnyani Boy Angga Dwi Pujiastuti Fahendri Fahendri Hanifah Azzaura Musyayyadah Irvan Maulana Ledyva Depinta Mohamad Nazri Abdul Halif Muhammad Siddiq Ilyas Lubis Muldarisnur, Mulda Nando Saputra Oqely Wahyudi Salman Abdul Azis Syafwan, Mahdhivan Toni Widianto Trengginas Eka Putra Sutantyo Wahyu Hidayat Wahyu Hidayat Wildian Wildian