title: Long lifetime plasma channel in air generated by multiple femtosecond laser pulses and an external electrical field.
abstract: The lifetime of a plasma channel produced by self-guiding intense femtosecond laser pulses in air is largely prolonged by adding a high voltage electrical field in the plasma and by introducing a series of femtosecond laser pulses. An optimal lifetime value is realized through adjusting the delay among these laser pulses. The lifetime of a plasma channel is greatly enhanced to 350 ns by using four sequential intense 100fs(FWHM) laser pulses with an external electrical field of about 350kV/m, which proves the feasibility of prolonging the lifetime of plasma by adding an external electrical field and employing multiple laser pulses.
authors.forename: Jiabin
authors.initials: J
authors.lastname: Zhu
authors.forename: Zhonggang
authors.initials: Z
authors.lastname: Ji
authors.forename: Yunpei
authors.initials: Y
authors.lastname: Deng
authors.forename: Jiansheng
authors.initials: J
authors.lastname: Liu
authors.forename: Ruxin
authors.initials: R
authors.lastname: Li
authors.forename: Zhizhan
authors.initials: Z
authors.lastname: Xu