Generation of parabolic pulse in a dispersion and nonlinearity jointly engineered silicon waveguide taper

Mei, Chao, Yuan, Jinhui, Li, Feng, Yan, Binbin, Sang, Xinzhu, Zhou, Xian, Wu, Qiang, Wang, Kuiru, Long, Keping and Yu, Chongxiu (2019) Generation of parabolic pulse in a dispersion and nonlinearity jointly engineered silicon waveguide taper. Optics Communications, 448. pp. 48-54. ISSN 0030-4018

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Official URL: https://doi.org/10.1016/j.optcom.2019.05.011

Abstract

In this paper, we numerically investigate the generation of parabolic pulse (PP) in a silicon waveguide taper with simultaneous variations of the group-velocity dispersion and nonlinearity along the propagation direction. The design of such a waveguide taper is based on the condition of self-similar propagation of the PP. When Gaussian, hyperbolic secant, and super-Gaussian pulses are propagated inside the waveguide taper designed, the evolution processes under the ideal condition are analyzed. Then the PP generation from Gaussian input is shown when higher-order dispersion, higher-order nonlinearity, linear loss, two-photon absorption, free-carrier absorption, and free-carrier dispersion are taken into account. Moreover, the influences of the initial chirp, pulse width, peak power, and waveguide length on the PP generation are further discussed. It is demonstrated that high-quality PP can be obtained with a mismatch parameter as low as 1.3×10 −3 , in the designed silicon waveguide taper.

Item Type: Article
Uncontrolled Keywords: Parabolic pulse, Silicon waveguide, Self-similar theory
Subjects: F100 Chemistry
F200 Materials Science
F300 Physics
F500 Astronomy
H600 Electronic and Electrical Engineering
Department: Faculties > Engineering and Environment > Mathematics, Physics and Electrical Engineering
Depositing User: Elena Carlaw
Date Deposited: 06 Jun 2019 13:53
Last Modified: 11 Oct 2019 09:07
URI: http://nrl.northumbria.ac.uk/id/eprint/39542

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