Dispersion engineered ZnSe rib waveguide for mid-infrared supercontinuum generation

Yi Ming Fang, Zhen Yang, Pei Peng Xu, Kun Lun Yan, Yan Sheng, Rong Ping Wang*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)


Mid-infrared supercontinuum generation in dispersion-engineered ZnSe rib waveguides was investigated for the first time. Numerical results showed that the zero-dispersion wavelength can be shifted to a shorter wavelength by adjusting structural parameters and refractive index contrast between the core and cladding layers in the waveguide. The optical field can be well confined in the 4- and 8-μm wide waveguides with a 2-μm thick cladding layer of Ge5As10S85 glass. The effect of waveguide parameters on the bandwidth of the supercontinuum spectrum at a 5-cm-long waveguide was also simulated to understand the effect of the pump wavelength and structure parameters on the supercontinuum generation. Our results showed that supercontinuum output could vary over a wide range depending on structural parameters of the waveguide, the pump power and wavelength. An ultrabroad supercontinuum spectrum from 3.0 up to 12.2 μm (> 2 octaves) was confirmed in a 4 μm-width waveguide with a peak pump power of 20 kW and a pump wavelength of 4.5 μm, which is promising as one of the on-chip supercontinuum light sources for many applications such as biomedical imaging, and environmental and industrial sensing in the mid-infrared.

Original languageEnglish
Pages (from-to)508-515
Number of pages8
JournalHongwai Yu Haomibo Xuebao/Journal of Infrared and Millimeter Waves
Issue number4
Publication statusPublished - Aug 2021
Externally publishedYes


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