Multipass-cell-based pulse compression to sub-two-cycle duration at 2 µm

Optics Letters 2026

View at publisher
Authors: Ziyao Wang, Warunya Röder, Tobias Heuermann, Chang Liu, Philipp Gierschke, Yi Wen Zhang, Maximilian Karst, Mathias Lenski, Lucas Eisenbach, Robert Klas, Jan Rothhardt, Jens Limpert
DOI: 10.1364/ol.586515
Cited by: 1
References: 32

Abstract

We present a laser source at 1.9 µm wavelength delivering 11.0 fs pulses with 1.36 mJ pulse energy and 137 W average power at a repetition rate of 101 kHz, achieved by applying pulse compression in a gas-filled multipass cell to a Tm:fiber chirped-pulse amplification (Tm:fCPA) system. This work marks the first, to the best of our knowledge, demonstration of MPC-based sub-two-cycle pulse compression in the shortwave infrared (SWIR) region and sets a new benchmark for the highest average power reported from a sub-two-cycle SWIR source. The exceptional combination of high pulse energy and average power makes this source well-suited for driving nonlinear frequency conversion processes across a broad spectral range, including terahertz, mid-infrared, and soft X-ray.

Fields of Study & Subjects

Laser-Matter Interactions and Applications Advanced Fiber Laser Technologies Photorefractive and Nonlinear Optics

Publication details

Journal / source
Optics Letters
Publisher
Optica Publishing Group
Volume
51
Issue
9
Pages
2460–2460
Publication date
1 April 2026
Language
EN