中国物理B ›› 2001, Vol. 10 ›› Issue (8): 735-738.doi: 10.1088/1009-1963/10/8/313

• CLASSICAL AREAS OF PHENOMENOLOGY • 上一篇    下一篇

DYNAMICS OF IONIZATION-ENHANCED SPECTRAL EXPANSION IN WATER INDUCED BY AN INTENSE FEMTOSECOND LASER BEAM

王树峰1, 秦元东1, 杨宏1, 王丹翎1, 朱长军1, 龚旗煌2   

  1. (1)National Laboratory for Mesoscopic Physics and Department of Physics, Beijing University, Beijing 100871, China; (2)National Laboratory for Mesoscopic Physics and Department of Physics, Beijing University, Beijing 100871; and Institute of Physics, Chinese Academy of Science, Beijing 100080, China
  • 收稿日期:2001-01-18 修回日期:2001-03-14 出版日期:2005-06-12 发布日期:2005-06-12
  • 基金资助:
    Project supported by the National Key Basic Research Special Foundation (NKBRSF) (Grant No. G1999075607) and the National Natural Science Foundation of China (Grant Nos. 19884001 and 19525412).

DYNAMICS OF IONIZATION-ENHANCED SPECTRAL EXPANSION IN WATER INDUCED BY AN INTENSE FEMTOSECOND LASER BEAM

Wang Shu-feng (王树峰)a, Qin Yuan-dong (秦元东)a, Yang Hong (杨宏)a, Wang Dan-ling (王丹翎)a, Zhu Chang-jun (朱长军)a, Gong Qi-huang (龚旗煌)b   

  1. a National Laboratory for Mesoscopic Physics and Department of Physics, Beijing University, Beijing 100871, China; b National Laboratory for Mesoscopic Physics and Department of Physics, Beijing University, Beijing 100871; and Institute of Physics, Chinese Academy of Science, Beijing 100080, China
  • Received:2001-01-18 Revised:2001-03-14 Online:2005-06-12 Published:2005-06-12
  • Supported by:
    Project supported by the National Key Basic Research Special Foundation (NKBRSF) (Grant No. G1999075607) and the National Natural Science Foundation of China (Grant Nos. 19884001 and 19525412).

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摘要： The dynamic process of white-continuum generation in water was investigated by the pump－probe technique with a femtosecond intense laser at 805nm. The spectrum width of the probe beam was broadened at the blue side and varied with different delay times. This blueshift was attributed to the ionization-enhanced optical nonlinearity, in which both the multi-photon ionization and avalanche ionization had an effect.

Abstract: The dynamic process of white-continuum generation in water was investigated by the pump－probe technique with a femtosecond intense laser at 805nm. The spectrum width of the probe beam was broadened at the blue side and varied with different delay times. This blueshift was attributed to the ionization-enhanced optical nonlinearity, in which both the multi-photon ionization and avalanche ionization had an effect.

Key words: supercontinuum, ionization, ultrafast

中图分类号:  (Ultrafast processes; optical pulse generation and pulse compression)

  • 42.65.Re
42.60.Jf (Beam characteristics: profile, intensity, and power; spatial pattern formation) 42.55.Rz (Doped-insulator lasers and other solid state lasers)