Focused axisymmetric spatially chirped beams

TL;DR

This paper characterizes the properties of focused radially chirped beams, showing how their key features can be emulated with simple axisymmetric arrays, aiding practical generation despite challenges.

Contribution

It introduces a detailed analysis of focused radially chirped beams and demonstrates how their main features can be replicated using simple arrays of 1D spatially chirped beams.

Findings

Key properties include variable on-axis velocity and pulse front tilt.

Primary characteristics can be mimicked with simple arrays.

Practical generation of ideal beams remains challenging.

Abstract

A characterization of the focused space-time structures of radially chirped beams is provided, detailing different tunable properties such as: variable on-axis centroid velocity, symmetric pulse front tilt, transverse intensity modulations, and polarization states. While the practical generation of ideal radially chirped beams and polarizations can be problematic, it is shown that the primary characteristics of these beams can be mimicked with simple arrays of axisymmetric, 1D spatially chirped beams.