Evolution of the frequency chirp of Gaussian pulses and beams when passing through a pulse compressor

	Evolution of the frequency chirp of Gaussian pulses and beams when passing through a pulse compressor
	Li Derong; Lv Xiaohua; Bowlan Pamela; Du Rui; Zeng Shaoqun; Luo Qingming
刊名	OPTICS EXPRESS
	2009
卷号	17 期号:19 页码:17070-17081
英文摘要	The evolution of the frequency chirp of a laser pulse inside a classical pulse compressor is very different for plane waves and Gaussian beams, although after propagating through the last (4th) dispersive element, the two models give the same results. In this paper, we have analyzed the evolution of the frequency chirp of Gaussian pulses and beams using a method which directly obtains the spectral phase acquired by the compressor. We found the spatiotemporal couplings in the phase to be the fundamental reason for the difference in the frequency chirp acquired by a Gaussian beam and a plane wave. When the Gaussian beam propagates, an additional frequency chirp will be introduced if any spatiotemporal couplings (i.e. angular dispersion, spatial chirp or pulse front tilt) are present. However, if there are no couplings present, the chirp of the Gaussian beam is the same as that of a plane wave. When the Gaussian beam is well collimated, the introduced frequency chirp predicted by the plane wave and Gaussian beam models are in closer agreement. This work improves our understanding of pulse compressors and should be helpful for optimizing dispersion compensation schemes in many applications of femtosecond laser pulses. © 2009 Optical Society of America.
收录类别	SCI
原文出处	http://www.ncbi.nlm.nih.gov/pubmed/19770925
语种	英语
内容类型	期刊论文
源URL	[http://ir.siat.ac.cn:8080/handle/172644/2539]
专题	深圳先进技术研究院_医工所
作者单位	OPTICS EXPRESS
推荐引用方式 GB/T 7714	Li Derong,Lv Xiaohua,Bowlan Pamela,et al. Evolution of the frequency chirp of Gaussian pulses and beams when passing through a pulse compressor[J]. OPTICS EXPRESS,2009,17(19):17070-17081.
APA	Li Derong,Lv Xiaohua,Bowlan Pamela,Du Rui,Zeng Shaoqun,&Luo Qingming.(2009).Evolution of the frequency chirp of Gaussian pulses and beams when passing through a pulse compressor.OPTICS EXPRESS,17(19),17070-17081.
MLA	Li Derong,et al."Evolution of the frequency chirp of Gaussian pulses and beams when passing through a pulse compressor".OPTICS EXPRESS 17.19(2009):17070-17081.