Yushuo Guo, Lijuan Xu, Yuhao Guo, Yuke Zhai, Lin Zhang
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Recent Progresses in Dispersion Engineering for Broadband Nonlinear Applications
Group-velocity dispersion (GVD) engineering is vital to many nonlinear optical phenomena and has been widely used for nonlinear optics. In this work, we propose SiC- and Si3 N4-based waveguides, which are truly dispersion-flattened and simultaneously single-mode. An ultra-low and flat dispersion profile with four zero-dispersion wavelengths (ZDWs) can be obtained over an octave-spanning bandwidth from 1.8 to 3.6 μm. Meanwhile, only TE00 mode is supported in the proposed waveguide over the low-dispersion bandwidth.
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