| Original Articles |
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Conical Emission Patterns by Femtosecond Pulses with Different Spectral Bandwidths |
LI Yue-Xun, ZENG Zhi-Nan, GE Xiao-Chun, CHEN Xiao-Wei, LI Ru-Xin, XU
Zhi-Zhan |
| State Key Laboratory of High Field Laser Physics, Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, PO Box 800-211, Shanghai 201800 |
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| Cite this article: |
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LI Yue-Xun, ZENG Zhi-Nan, GE Xiao-Chun et al 2008 Chin. Phys. Lett. 25 4296-4299 |
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Abstract Different conical emission (CE) patterns are obtained experimentally at various incident powers and beam sizes of pump laser pulses with pulse durations of 7fs, 44fs and 100fs. The results show that it is the incident power but not the incident power density that determines a certain CE pattern. In addition, the critical powers for similar CE patterns are nearly the same for the laser pulses with the same spectral bandwidth. Furthermore, as far as a certain CE pattern is concerned, the wider the spectral bandwidth of pump laser pulse is, the higher the critical power is. This will hopefully provide new insights for the generation of CE pattern in optical medium.
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| Keywords:
42.65.-k
42.90.+m
42.65.Jx
42.65.Sf
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Received: 02 July 2008
Published: 27 November 2008
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| PACS: |
42.65.-k
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(Nonlinear optics)
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42.90.+m
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(Other topics in optics)
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42.65.Jx
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(Beam trapping, self-focusing and defocusing; self-phase modulation)
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42.65.Sf
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(Dynamics of nonlinear optical systems; optical instabilities, optical chaos and complexity, and optical spatio-temporal dynamics)
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