Phase-matched high-order-harmonic generation by self-guided intense femtosecond laser pulses

被引：1
|
作者：
Midorikawa, K [1 ]
Tamaki, Y [1 ]
Itatani, J [1 ]
Obara, M [1 ]
机构：
[1] RIKEN, Inst Phys & Chem Res, Wakoshi, Saitama 3510198, Japan
来源：
SOFT X-RAY LASERS AND APPLICATIONS III | 1999年 / 3776卷
关键词：
high-order harmonics; coherent x ray; phase matching; high intensity lasers; nonlinear optics;
D O I：
10.1117/12.366683
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
We describe the phase-matched high-order-harmonic generation of femtosecond Ti:sapphire laser pulses in a self-guiding channel. Generation efficiency of the high-order harmonic was improved by phase-matched propagation in the guiding channel. The harmonics around the 49th harmonic (16 nm) were enhanced by two orders of magnitude compared to those in the plateau with a 7-mm-long, self-guided pulse in Ne. High-harmonic conversion efficiency of 1 0(-6) was obtained, producing > nJ harmonics in the cutoff region around the 49th harmonic. The results are well explained by considering both the intrinsic phase based on the single-atom response and the macroscopic phase matching in the high-intensity interaction region.
引用
收藏
页码：135 / 142
页数：8
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