Soliton self-frequency shift of 6-fs pulses in photonic-crystal fibers
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- Serebryannikov, E.E., Zheltikov, A.M., Ishii, N. et al. Appl. Phys. B (2005) 81: 585. doi:10.1007/s00340-005-1929-8
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Raman soliton phenomena in photonic crystal fibers are shown to allow efficient tunable frequency shifting of sub-10-fs laser pulses. Soliton self-frequency shift in a photonic-crystal fiber with a core diameter less than 2 μm is used to transform the spectrum of a 6-fs 2-nJ Ti: sapphire-laser pulse, dominated by a 670-nm peak, into a spectrum featuring a well-resolved intense spectral component centered at 1064 nm, which is ideally suited as a seed for Nd: YAG- and ytterbium-based laser devices.