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

Yujun Cheng, Jintao Lai, Jinhui Yuan*, Chao Mei, Xian Zhou, Qiang Wu, Bin Liu, Binbin Yan, Kuiru Wang, Chongxiu Yu, Xinzhu Sang

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

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.

Original languageEnglish
Pages (from-to)9994-10001
Number of pages8
JournalApplied Optics
Volume60
Issue number31
DOIs
Publication statusPublished - 1 Nov 2021

Fingerprint

Dive into the research topics of 'Highly coherent and multi-octave mid-infrared supercontinuum generations in a reverse-strip AlGaAs waveguide with three zero-dispersion wavelengths'. Together they form a unique fingerprint.

Cite this