Enhanced self-compression of mid-infrared laser filaments in argon

被引：48

作者：

Berge, Luc ^{[1
]}

Rolle, Jeremie ^{[1
]}

Koehler, Christian ^{[1
]}

机构：

[1] CEA, DAM, DIF, F-91297 Arpajon, France

来源：

PHYSICAL REVIEW A | 2013年 / 88卷 / 02期

关键词：

SUPERCONTINUUM GENERATION; MU-M; PULSES; AIR; LIGHT;

D O I：

10.1103/PhysRevA.88.023816

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

We investigate the nonlinear propagation of femtosecond laser filaments created at central wavelengths between 0.8 and 8 mu m in a pressurized argon gas. Attention is paid to spectral broadenings and self-compression of mid-infrared pulses. It is shown that the longer the central wavelength is, the more efficient the pulse compression is. Three key mechanisms entering the spectral dynamics, i.e., low-order-harmonic generation, four-wave mixing, and self-steepening, are discussed.

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页数：7

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