Enhancement of third harmonic generation in air filamentation using obstacles

doi:10.1088/1674-1056/24/3/034207

Abstract

The intensity of third harmonic emission in air filamentation disturbed by copper fibers and alcohol droplets has been investigated experimentally. Enhancement of the third harmonic emission up to more than one order of magnitude has been observed. The physical mechanism of third harmonic enhancement is attributed to suppression of the destructive interference by comparison of the experimental results and it is closely related to the type, size, and relative position of the obstacles.

Keywords: third harmonic emission filamentation femtosecond laser pulse

Received: 04 November 2014
Revised: 15 November 2014
Accepted manuscript online:

PACS:	42.65.Ky	(Frequency conversion; harmonic generation, including higher-order harmonic generation)
	52.38.Hb	(Self-focussing, channeling, and filamentation in plasmas)
	42.65.Re	(Ultrafast processes; optical pulse generation and pulse compression)

Fund:

Project supported by the National Key Technology R&D Program of the Ministry of Science and Technology, China (Grant No. 2012BAC23B00) and the National Natural Science Foundation of China (Grants No. 11404335).

Corresponding Authors: Liu Xiao-Long
E-mail: liuxiaolong@aoe.ac.cn

Cite this article:

Liu Xiao-Long (刘晓龙), Lu Xin (鲁欣), Du Zhi-Gui (杜志贵), Ma Jing-Long (马景龙), Li Yu-Tong (李玉同), Zhang Jie (张杰) Enhancement of third harmonic generation in air filamentation using obstacles 2015 Chin. Phys. B 24 034207

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