Analysis of terahertz generation using tilted pulse fronts

被引：14
|
作者：
Ravi, Koustuban [1 ,2 ,3 ]
Kaertner, Franz [1 ,2 ,3 ,4 ]
机构：
[1] DESY, Ctr Free Electron Laser Sci, Notkestr 85, D-22607 Hamburg, Germany
[2] MIT, Elect Res Lab, Cambridge, MA 02139 USA
[3] MIT, Dept Elect Engn & Comp Sci, Cambridge, MA 02139 USA
[4] Univ Hamburg, Dept Phys, D-22761 Hamburg, Germany
来源：
OPTICS EXPRESS | 2019年 / 27卷 / 03期
基金：
欧洲研究理事会;
关键词：
THZ PULSES; LASER-PULSES; LINBO3; POWER;
D O I：
10.1364/OE.27.003496
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
A spatio-temporal analysis of terahertz generation by optical rectification of tilted pulse fronts is presented. Closed-form expressions of terahertz transients and spectra in two spatial dimensions are furnished in the undepleted limit. Importantly, the analysis incorporates spatio-temporal distortions of the optical pump pulse such as angular dispersion, group velocity dispersion due to angular dispersion, spatial and temporal chirp, as well as beam curvature. The influence of the radius of curvature on the tilt angle is shown. Furthermore, the impact of group velocity dispersion due to angular dispersion on terahertz frequency, conversion efficiency and peak field is revealed. In particular, the deterioration of terahertz frequency, efficiency and field at large pump bandwidths and beam sizes by group velocity dispersion due to angular dispersion is expressed analytically. (C) 2019 Optical Society of America under the terms of the OSA Open Access Publishing Agreement
引用
收藏
页码：3496 / 3517
页数：22
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