Highly coherent and multi-octave mid-infrared supercontinuum generations in a reverse-strip AlGaAs waveguide with three zero-dispersion wavelengths

Cheng, Yujun, Lai, Jintao, Yuan, Jinhui, Mei, Chao, Zhou, Xian, Wu, Qiang, Liu, Bin, Yan, Binbin, Wang, Kuiru, Yu, Chongxiu and Sang, Xinzhu (2021) Highly coherent and multi-octave mid-infrared supercontinuum generations in a reverse-strip AlGaAs waveguide with three zero-dispersion wavelengths. Applied Optics, 60 (31). pp. 9994-10001. ISSN 1559-128X

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Official URL: https://doi.org/10.1364/AO.440682

Abstract

In this paper, a reverse-strip AlGaAs waveguide with three zero-dispersion wavelengths (ZDWs) is designed. The corresponding three ZDWs are located at 3.74, 6.56, and 8.89 µm. The nonlinearity coefficient of the proposed reverse-strip AlGaAs waveguide is calculated as 2.09 W−1 m−1 at wavelength 4.9 µm. The effects of pump pulse parameters, waveguide length, and noise coefficient on the nonlinear dynamics of supercontinuum (SC) generation are investigated. When the hyperbolic secant pump pulse with a wavelength of 4.9 µm, peak power of 900 W, and duration of 100 fs is launched into the proposed waveguide and propagated after a 3 mm length, highly coherent and multi-octave mid-infrared (MIR) SC spanning from 2.2 to 14.5 µm (more than 2.7 octaves, at −40 dB level) is generated. Finally, a possible fabrication process of the reverse-strip AlGaAs waveguide is introduced. Our research results have important applications in MIR photonics, MIR spectroscopy, optical precision measurement, and more.

Item Type: Article
Additional Information: Funding information: Funding. National Natural Science Foundation of China (61875238); BUPT Excellent Ph.D. Students Foundation (CX2020319).
Subjects: F300 Physics
H600 Electronic and Electrical Engineering
Department: Faculties > Engineering and Environment > Mathematics, Physics and Electrical Engineering
Depositing User: Rachel Branson
Date Deposited: 22 Nov 2021 11:20
Last Modified: 22 Nov 2021 11:30
URI: http://nrl.northumbria.ac.uk/id/eprint/47808

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