Abstract
The nonlinear propagation of ultrashort pulses in a microstructured fiber is experimentally investigated. By working around 800 nm, in the anomalous dispersion region, clear evidence of pulse break-up and soliton propagation is obtained. This is consistent with the recently suggested mechanism of spectral broadening based upon the fission of higher order solitons into red-shifted fundamental solitons and blue-shifted dispersion waves. When 190-fs pulses at high input intensities are used, the output spectrum is made of a broad infrared supercontinuum coexisting with a sharp and very intense blue peak that takes up to 24% of the input power. We tentatively propose an explanation of this effect by invoking pulse-trapping phenomena controlled by the group-velocity matching of infrared and visible pulses.
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42.65.Tg; 42.81.Dp
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Tartara, L., Cristiani, I. & Degiorgio, V. Blue light and infrared continuum generation by soliton fission in a microstructured fiber. Appl Phys B 77, 307–311 (2003). https://doi.org/10.1007/s00340-003-1172-0
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DOI: https://doi.org/10.1007/s00340-003-1172-0