Measurement of high order Kerr refractive index of major air components

被引：196

作者：

Loriot, V. ^{[1
]}

Hertz, E. ^{[1
]}

Faucher, O. ^{[1
]}

Lavorel, B. ^{[1
]}

机构：

[1] Univ Bourgogne, CNRS, UMR 5209, Inst Carnot Bourgogne, F-21078 Dijon, France

来源：

OPTICS EXPRESS | 2009年 / 17卷 / 16期

关键词：

LASER-PULSES; O-2; FILAMENTATION; PROPAGATION; MOLECULES;

D O I：

10.1364/OE.17.013429

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

We measure the instantaneous electronic nonlinear refractive index of N-2, O-2, and Ar at room temperature for a 90 fs and 800 nm laser pulse. Measurements are calibrated by post-pulse molecular alignment through a polarization technique. At low intensity, quadratic coefficients n(2) are determined. At higher intensities, a strong negative contribution with a higher nonlinearity appears, which leads to an overall negative nonlinear Kerr refractive index in air above 26 TW/cm(2). (C) 2009 Optical Society of America

引用

页码：13429 / 13434

页数：6

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