Optimization of High-Order Harmonic by Genetic Algorithm for the Chirp and Phase of Few-Cycle Pulses

Chin. Phys. Lett.

2005, Vol. 22

Issue (4): 873-876 DOI:

Original Articles

Optimization of High-Order Harmonic by Genetic Algorithm for the Chirp and Phase of Few-Cycle Pulses

XIAO Jun¹;SUN Zhen-Rong¹;WANG Yu-Feng¹;DENG Li¹;ZHANG Xiang-Yun¹;CHEN Guo-Liang¹;ZHANG Wei-Ping¹;WANG Zu-Geng¹;XU Zhi-Zhan¹;LI Ru-Xin¹

¹Key Laboratory of Optical and Magnetic Resonance Spectroscopy, Department of Physics, and Department of Mathematics, East China Normal University, Shanghai 200062 ¹Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 201800

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XIAO Jun, SUN Zhen-Rong, WANG Yu-Feng et al 2005 Chin. Phys. Lett. 22 873-876

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Abstract The brightness of a particular harmonic order is optimized for the chirp and initial phase of the laser pulse by genetic algorithm. The influences of the chirp and initial phase of the excitation pulse on
the harmonic spectra are discussed in terms of the semi-classical model including the propagation effects. The results indicate that the harmonic intensity and cutoff have strong dependence on the chirp of the laser pulse, but slightly on its initial phase. The high-order harmonics can be enhanced by the optimal laser pulse and its cutoff can be tuned by optimization of the chirp and initial phase of the laser pulse.

Keywords: 42.50.Hz 32.80.Qk 42.65.Ky 32.80.Wr

Published: 01 April 2005

PACS:	42.50.Hz	(Strong-field excitation of optical transitions in quantum systems; multiphoton processes; dynamic Stark shift)
	32.80.Qk	(Coherent control of atomic interactions with photons)
	42.65.Ky	(Frequency conversion; harmonic generation, including higher-order harmonic generation)
	32.80.Wr	(Other multiphoton processes)

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https://cpl.iphy.ac.cn/ OR https://cpl.iphy.ac.cn/Y2005/V22/I4/0873

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	XIAO Jun
	SUN Zhen-Rong
	WANG Yu-Feng
	DENG Li
	ZHANG Xiang-Yun
	CHEN Guo-Liang
	ZHANG Wei-Ping
	WANG Zu-Geng
	XU Zhi-Zhan
	LI Ru-Xin

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