Journal
OPTICS LETTERS
Volume 35, Issue 10, Pages 1653-1655Publisher
OPTICAL SOC AMER
DOI: 10.1364/OL.35.001653
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Funding
- Australian Research Council [DP0878560]
- Griffith University
- Australian Postgraduate Awards
- Australian Research Council [DP0878560] Funding Source: Australian Research Council
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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
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