Mid-infrared self-similar compression of picosecond pulse in an inversely tapered silicon ridge waveguide

Yuan, Jinhui, Chen, Jian, Li, Feng, Mei, Chao, Kang, Zhe, Zhang, Xianting, Xu, Yin, Yan, Binbin, Sang, Xinzhu, Wu, Qiang, Zhou, Xian, Zhong, Kangping, Wang, Kuiru, Yu, Chongxiu, Farrell, Gerald and Wai, P. K. A. (2017) Mid-infrared self-similar compression of picosecond pulse in an inversely tapered silicon ridge waveguide. Optics Express, 25 (26). p. 33439. ISSN 1094-4087

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Abstract

On chip high quality and high degree pulse compression is desirable in the realization of integrated ultrashort pulse sources, which are important for nonlinear photonics and spectroscopy. In this paper, we design a simple inversely tapered silicon ridge waveguide with exponentially decreasing dispersion profile along the propagation direction, and numerically investigate self-similar pulse compression of the fundamental soliton within the mid-infrared spectral region. When higher-order dispersion (HOD), higher-order nonlinearity (HON), losses (α), and variation of the Kerr nonlinear coefficient γ(z) are considered in the extended nonlinear Schrödinger equation, a 1 ps input pulse at the wavelength of 2490 nm is successfully compressed to 57.29 fs in only 5.1-cm of propagation, along with a compression factor Fc of 17.46. We demonstrated that the impacts of HOD and HON are minor on the pulse compression process, compared with that of α and variation of γ(z). Our research results provide a promising solution to realize integrated mid-infrared ultrashort pulse sources.

Item Type:	Article
Uncontrolled Keywords:	Field size, Laser sources, Picosecond pulses, Pulse compression, Pulse propagation, Refractive index
Subjects:	F300 Physics
Department:	Faculties > Engineering and Environment > Mathematics, Physics and Electrical Engineering
Depositing User:	Paul Burns
Date Deposited:	22 Nov 2018 10:18
Last Modified:	11 Oct 2019 18:30
URI:	http://nrl.northumbria.ac.uk/id/eprint/36862

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