Self-focusing in air with phase-stabilized few-cycle light pulses

被引：19

作者：

Laban, D. E. ^{[1
]}

Wallace, W. C. ^{[1
]}

Glover, R. D. ^{[1
]}

Sang, R. T. ^{[1
]}

Kielpinski, D. ^{[1
]}

机构：

[1] Griffith Univ, Ctr Quantum Dynam, Australian Attosecond Sci Facil, Nathan, Qld 4111, Australia

来源：

OPTICS LETTERS | 2010年 / 35卷 / 10期

基金：

澳大利亚研究理事会;

关键词：

CARRIER-ENVELOPE PHASE; LASER-PULSES; FILAMENTATION; GENERATION; INTENSE; POWER; FS;

D O I：

10.1364/OL.35.001653

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

We investigate the nonlinear optical phenomenon of self-focusing in air with phase-stabilized few-cycle light pulses. This investigation looks at the role of the carrier-envelope phase by observing a filament in air, a nonlinear phenomenon that can be utilized for few-cycle pulse compression [Appl. Phys. B 79, 673 (2004)]. We were able to measure the critical power for self-focusing in air to be 18+/-1 GW for a 6.3 fs pulse centered at 800 nm. Using this value and a basic first-order theory, we predicted that the self-focusing distance should deviate by 790 mu m as the carrier-envelope phase is shifted from 0 to pi/2 rad. In contrast, the experimental results showed no deviation in the focus distance with a 3 sigma upper limit of 180 mu m. These counterintuitive results show the need for further study of self-focusing dynamics in the few-cycle regime. (C) 2010 Optical Society of America

引用

页码：1653 / 1655

页数：3

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