Abstract.
Photonic-molecule modes of a cobweb-microstructure fiber allow efficient nonlinear optical spectral broadening of nanojoule femtosecond light pulses. Spectral widths of approximately 200 nm are achieved at the output of a 6-cm sample of such a fiber for 40-fs Ti:sapphire laser pulses with an energy of a few nanojoules coupled into photonic-molecule modes. Higher values of the group index and a lower group-velocity dispersion, attainable with higher-order photonic-molecule modes, allow the efficiency of spectral broadening of femtosecond laser pulses to be increased relative to the efficiency of spectral broadening in the fundamental photonic-molecule mode.
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Received: 9 June 2002 / Revised version: 29 June 2002 / Published online: 22 November 2002
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Fedotov, A., Zhou, P., Naumov, A. et al. Spectral broadening of 40-fs Ti:sapphire laser pulses in photonic-molecule modes of a cobweb-microstructure fiber . Appl Phys B 75, 621–627 (2002). https://doi.org/10.1007/s00340-002-1007-4
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DOI: https://doi.org/10.1007/s00340-002-1007-4