Skip to main content
U.S. flag

An official website of the United States government

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Secure .gov websites use HTTPS
A lock ( ) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.

Controlling femtosecond filament propagation using externally driven gas motion

Published

Author(s)

Jared K. Wahlstrand, Nihal Jhajj, H M. Milchberg

Abstract

The thermal density depression (or “density hole”) produced by a high repetition rate femtosecond filament in air acts as a negative lens, altering the propagation of the filament. We discuss the effects of externally driven gas motion on these density holes and the resulting filament deflection, and we derive an expression for the gas velocity that maximizes the effect. At gas velocities more than 3 times this value, the density hole is displaced from the filament and no longer affects filament propagation. We demonstrate density hole displacement using an audio speaker-driven sound wave, leading to a controllable, repeatable deflection of the filament. Applications are discussed, including quasi phase matching in gas-based nonlinear optics.
Citation
Optics Letters
Volume
44
Issue
2

Keywords

nonlinear optics, thermal effects, acoustics

Citation

Wahlstrand, J. , Jhajj, N. and Milchberg, H. (2019), Controlling femtosecond filament propagation using externally driven gas motion, Optics Letters, [online], https://doi.org/10.1364/OL.44.000199 (Accessed May 29, 2024)

Issues

If you have any questions about this publication or are having problems accessing it, please contact reflib@nist.gov.

Created January 2, 2019, Updated February 7, 2019