Chinese Journal of Quantum Electronics ›› 2020, Vol. 37 ›› Issue (5): 513-523.

• Special Issue on Laser Propogation and Detection in Atmosphere •     Next Articles

Properties of long plasma-channel generated by TW femtosecond laser in natural environmental air

TENG Hao1, LU Xin1, SHEN Zhongwei1, CHEN Shiyou1, CHEN Rongyi2, WEI Wenshou2, WEI Zhiyi1   

  1. 1 Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China; 2 Institute of Desert Meteorology, China Meteorological Administration, Urumqi 830002, China
  • Received:2020-06-08 Revised:2020-07-07 Published:2020-09-28 Online:2020-09-28

Abstract: The properties of long plasma-channel generated by terawatt (TW) femtosecond laser propagating in natural environmental air are investigated. It shows that the plasma filamentation with length of 2 km can be achieved when 2 TW femtosecond laser propagates in natural environment, and the electron density is measured to be 1011 cm􀀀3 at different location of filament, which shows the good conductivity of plasma channel even at the end of channel. Moreover, high voltage discharge test also confirms that, compared with the case without plasma channel, the high voltage of discharging can be reduced by 30% when plasma channel exists, which indicates the effectiveness of fs laser induced discharging. This work paves away for generation of several kilometer and long lifetime filamentation in air, laser induced lightning, environmental monitoring, and artificial intervention of climate.

Key words: laser technology, ultrashort pulse laser, plasma channel, filamentation, laser induced lightning; femtosecond laser

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