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

Jinhui Yuan, Jian Chen, Feng Li, Chao Mei, Zhe Kang, Xianting Zhang, Yin Xu, Binbin Yan, Xinzhu Sang, Qiang Wu, Xian Zhou, Kangping Zhong, Kuiru Wang, Chongxiu Yu, Gerald Farrell, P. K.A. Wai

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14 Citations (Scopus)
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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.

Original languageEnglish
Pages (from-to)33439-33450
Number of pages12
JournalOptics Express
Volume25
Issue number26
DOIs
Publication statusPublished - 22 Dec 2017

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