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Proceedings Paper

A brief analysis on pulse front tilt in simultaneous spatial and temporal focusing
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Paper Abstract

The spatial and temporal behavior of ultrashort pulses has drawn more and more attention. Especially in laser material processing, such spatio-temporal behavior has significant influences. In this paper we present a brief analysis on the pulse front tilt (PFT) in simultaneous spatial and temporal focusing (SSTF) mathematically and in simulations. We apply paraxial field tracing based on the Collins integral for modeling the spatio-temporal focusing process. Using the shift theorem of the Fourier transformation, we present an explanation of the PFT in focus for general input pulses. Next, by assuming a Gaussian lateral pulse shape, an analytical solution for the field distribution at any position in the region is obtained. In this work we take the influence of an initial PFT before focusing into considerations as well and find potential way to control the PFT during the focusing process. Finally with the optical modeling software VirtualLabTM we present rigorous simulations of the SSTF to verify our mathematical conclusions.

Paper Details

Date Published: 1 May 2014
PDF: 16 pages
Proc. SPIE 9135, Laser Sources and Applications II, 91350V (1 May 2014); doi: 10.1117/12.2057709
Show Author Affiliations
Site Zhang, Friedrich-Schiller-Univ. Jena (Germany)
Frank Wyrowski, Friedrich-Schiller-Univ. Jena (Germany)
LightTrans VirtualLab UG (Germany)
Robert Kammel, Friedrich-Schiller-Univ. Jena (Germany)
Stefan Nolte, Friedrich-Schiller-Univ. Jena (Germany)

Published in SPIE Proceedings Vol. 9135:
Laser Sources and Applications II
Jacob I. Mackenzie; Helena JelÍnková; Takunori Taira; Marwan Abdou Ahmed, Editor(s)

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