We demonstrate that the soliton-effect compression to few- and single-cycle pulse widths in a highly nonlinear fiber can be optimized by properly choosing the input soliton number. Soliton compression to a 2-fs pulse width with a compression ratio up to 50 is demonstrated for light pulses with an initial central wavelength of 10700.3em0exnm by solving the generalized nonlinear Schr\"odinger equation for a dispersion profile typical of a small-core photonic-crystal fiber.
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Voronin et al. (2008) studied this question.
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