We numerically investigate self-frequency blueshifting of a fundamental soliton in a gas-filled hollow-core photonic crystal fiber. Because of the changing underlying soliton parameters, the blueshift gives rise to adiabatic soliton compression. Based on these features, we propose a device that enables frequency shifting over an octave and pulse compression from 30 fs down to 2.3 fs.
Chang, W., Hölzer, P., Travers, J. C., & Russell, P. S. J. (2013). Combined soliton pulse compression and plasma-related frequency upconversion in gas-filled photonic crystal fiber. Optics Letters, 38(16), 2984-2987. https://doi.org/10.1364/OL.38.002984