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Pulse compression and supercontinuum at different powers of femtosecond pulses in water

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Abstract

Propagation of femtosecond light pulses in water is investigated. By changing input power from slightly above to highly above threshold for self-focusing, it is shown that either group velocity dispersion (GVD) or multi-photon ionization (MPI) and multi-photon absorption (MPA) may arrest the collapse. When MPI and MPA dominate the propagation, the pulse can be self-compressed to a few optical cycles. In spectral domain, MPI alone induces a strong blue shift. MPA can restrain this strong blue shift.

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收稿日期:2007-02-27

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徐凤:State Key Laboratory of High Field Laser Physics, Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 201800Graduate School of the Chinese Academy of Sciences, Beijing 100039
刘建胜:State Key Laboratory of High Field Laser Physics, Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 201800Graduate School of the Chinese Academy of Sciences, Beijing 100039
李儒新:State Key Laboratory of High Field Laser Physics, Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 201800
徐至展:State Key Laboratory of High Field Laser Physics, Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 201800

联系人作者:徐凤(xf_aurora@mail.siom.ac.cn)

备注:This work was supported by the Chinese National Major Basic Research Development Program (973 Program), and the National Natural Science Foundation of China (No. 10674145). F. Xu's e-mail address is xf_aurora@mail.siom.ac.cn.

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