Third-Order Harmonic Generation in Atmospheric Air with
Focused Intense Femtosecond Laser Pulses

Chin. Phys. Lett.

2001, Vol. 18

Issue (1): 57-59 DOI:

Original Articles

Third-Order Harmonic Generation in Atmospheric Air with Focused Intense Femtosecond Laser Pulses

ZHU Chang-Jun¹; QIN Yuan-Dong¹;YANG Hong¹;WANG Shu-Feng¹;GONG Qi-Huang ^1,2

¹National Laboratory for Mesoscopiof Physics and Department of Physics, Peking University Beijing 100871 ²Institute of Physics, Chinese Academy of Sciences, Beijing 100080

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ZHU Chang-Jun, QIN Yuan-Dong, YANG Hong et al 2001 Chin. Phys. Lett. 18 57-59

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Abstract Generation of third-order harmonics at 800 nm of femtosecond laser pulses is studied in neutral atmospheric air and in plasma of optical breakdown in air. Its efficiency is measured at different fundamental laser intensities. A maximum efficiency is observed at the intensity when optical breakdown in atmospheric air starts. The factors that exhibit the main effects on the harmonic generation, including self-focusing in a neutral air and self-focusing in plasma, are discussed.

Keywords: 42.65.Jx 42.65.Ky

Published: 01 January 2001

PACS:	42.65.Jx	(Beam trapping, self-focusing and defocusing; self-phase modulation)
	42.65.Ky	(Frequency conversion; harmonic generation, including higher-order harmonic generation)

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https://cpl.iphy.ac.cn/ OR https://cpl.iphy.ac.cn/Y2001/V18/I1/057

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