Simulation of Chirped Pulse Propagation in Silicon Nanowires: Shape and Spectrum Analysis

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Important Dates

Conference:

Aug. 18-20, 2018

Full Paper Due: Jul. 20, 2018

Abstract Due: Jul. 20, 2018

Audience Registration Due:
Aug. 18, 2018

Presentations of The Int'l Symposium on Photonics and Optoelectronics (SOPO 2016)

● Simulation of Chirped Pulse Propagation in Silicon Nanowires: Shape and Spectrum Analysis
Author(s)
Hassan Pakarzadeh
Affiliation(s)
Department of Physics, Shiraz University of Technology, Shiraz, Iran
KEYWORDS
Simulation, Shape, Spectrum Analysis
ABSTRACT
In this paper, we simulate the propagation of chirped pulses in silicon nanowires by solving thr nonlinear Schrödinger equation (NLSE) using the split-step Fourier (SSF) method. The simulations are performed both for the pulse shape (time domain) and for the pulse spectrum (frequency domain), and various linear and nonlinear effects changing the shape and the spectrum of the pulse are analyzed. Owing to the high nonlinear coefficient and a very small effective-mode area, the required length for observing nonlinear effects in nanowires is much shorter than that of conventional optical fibers. The impacts of loss, nonlinear effects, second- and third-order dispersion coefficients and the chirp parameter on pulse propagation along the nanowire are investigated. The results show that the sign and the value of the chirp parameter have important role in pulse propagation so that in the anomalous dispersion regime, the compression occurs for the up-chirped pulses, whereas the broadening takes place for the down-chirped pulses. The opposite situation happens for up-and down-chirped pulses propagating in the normal dispersion regime.