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李英骏

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期刊论文

Characteristics of self-guided laser plasma channels generated by femtosecond laser pulses in air

李英骏Hui Yang Jie Zhang* Yingjun Li Jun Zhang Yutong Li Zhenglin Chen Hao Teng Zhiyi Wei and Zhengming Sheng

PHYSICAL REVIEW E 66, 016406 (2002),-0001,():

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摘要/描述

With ultrashort laser pulses (25 fs) and low energy (E=15mJ), we observe laser plasma channels with a length over 5m in air. The diameter of the plasma channel is measured to be 120mm. The average electron density in the channel is inferred to be about 10 18W/cm3 with an interferometric method. At the same time, the temporal evolution of the electron density in the plasma channel is investigated. The resistivity in the plasma channel is measured to be less than 1V cm. It is suggested that the lifetime of the plasma channel can be greatly prolonged by launching another long laser pulse along the plasma channel.

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版权说明:以下全部内容由李英骏上传于   2009年06月26日 16时22分44秒,版权归本人所有。

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