Multipass cell for high-power few-cycle compression

TL;DR

This paper introduces a multipass cell with dielectrically enhanced silver mirrors for nonlinear pulse compression, achieving high power, broad spectral output, and near-transform-limited pulse durations, with scalability potential to 2 kW.

Contribution

The paper presents a novel multipass cell design using dielectrically enhanced silver mirrors, enabling high-power, few-cycle pulse compression with excellent beam quality and spectral homogeneity.

Findings

388 W average power output with 82% transmission

Pulse duration compressed to 6.9 fs

Scalability to 2 kW average power

Abstract

A multipass cell for nonlinear compression to few-cycle pulse duration is introduced comprising dielectrically enhanced silver mirrors on silicon substrates. Spectral broadening with 388 W output average power and 776 {\mu}J pulse energy is obtained at 82% cell transmission. A high output beam quality (M2<1.2) and a high spatio-spectral homogeneity (97.5%) as well as the compressibility of the output pulses to 6.9 fs duration are demonstrated. Finite element analysis reveals scalability of this cell to 2 kW average output power.