Antikainen, Aku Agrawal, Govind spectrogram_anim_16_microns.avi The spectrogram at various propagation distances in a seven core fiber where the core separation is 16 µm. The sech-shaped input pulse is launched in the center core, has a duration (FWHM) of 100 fs, and a peak power of 10 kW. multi-core fibers;nonlinear fiber phenomena 2019-08-20
    https://opticapublishing.figshare.com/articles/media/spectrogram_anim_16_microns_avi/8944574
10.6084/m9.figshare.8944574.v1