Investigation of spatiotemporal output beam profile instabilities from differentially pumped capillaries
Optics
2021-02-26 v1 Fluid Dynamics
Abstract
Differentially pumped capillaries, i.e., capillaries operated in a pressure gradient environment, are widely used for nonlinear pulse compression. In this work, we show that strong pressure gradients and high gas throughputs can cause spatiotemporal instabilities of the output beam profile. The instabilities occur with a sudden onset as the flow evolves from laminar to turbulent. Based on the experimental and numerical results, we derive guidelines to predict the onset of those instabilities and discuss possible applications in the context of nonlinear flow dynamics.
Keywords
Cite
@article{arxiv.2102.12749,
title = {Investigation of spatiotemporal output beam profile instabilities from differentially pumped capillaries},
author = {Martin Gebhardt and Emmanuel B. Amuah and Robert Klas and Henning Stark and Joachim Buldt and Albrecht Steinkopff and Jens Limpert},
journal= {arXiv preprint arXiv:2102.12749},
year = {2021}
}