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Spectral broadening of 40-fs Ti:sapphire laser pulses in photonic-molecule modes of a cobweb-microstructure fiber |
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| Authors: | A.B. Fedotov P. Zhou A.N. Naumov V.V. Temnov V.I. Beloglazov N.B. Skibina L.A. Mel’nikov A.V. Shcherbakov A.P. Tarasevitch D. von der Linde A.M. Zheltikov |
| Affiliation: | Physics Department, International Laser Center, M.V. Lomonosov Moscow State University, 119 899 Moscow, Russia, RU Institut für Laser- und Plasmaphysik, Universit?t Essen, 45 117 Essen, Germany, DE Institute of Glass Structure Technology and Equipment, pr. Stroitelei 1, 410 044 Saratov, Russia, RU |
| 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. Received: 9 June 2002 / Revised version: 29 June 2002 / Published online: 22 November 2002 RID="*" ID="*"Corresponding author. Fax: +7-095/939-3959, E-mail: zheltikov@top.phys.msu.su |
| Keywords: | PACS: 42.65.Wi 42.81.Qb |
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