Mainz 2026 – scientific programme

Parts | Days | Selection | Search | Updates | Downloads | Help

SYLA: Symposium New Trends in Laser Systems and their Applications for Photonic Quantum Systems and Emerging Technologies

SYLA 2: Laser Sources for Emerging Technologies – Enabling the Future

SYLA 2.4: Invited Talk

Wednesday, March 4, 2026, 16:00–16:30, HS 20

Ultrafast 2µm fiber lasers for scientific and industrial applications — Tobias Heuermann, Christian Kern, Ziyao Wang, Evgeny Shestaev, •Oliver Herrfurth, Christian Gaida, and Tino Eidam — Active Fiber Systems GmbH

Tm-based fiber lasers have emerged as compelling ultrafast sources in the 2-µm spectral region. We report recent progress on a thulium-doped fiber chirped-pulse amplification system aiming to deliver 200 W average power, 2 mJ pulse energy, and 150 fs pulse duration at 2µm. Key challenges, including atmospheric water absorption, high thermal load and nonlinear effects in fiber amplifiers, are mitigated through a novel fiber module design and a sealed system enclosure enabling dry or vacuum operation. Further peak-power scaling is achieved via spectral phase and amplitude optimization of the seed pulses.

Furthermore, we present results on a >500W / 5mJ source featuring between 10ns to 500ns pulse duration. A potential application can be EUV plasma generation, but also other applications seem feasible. In summary, we show different system architectures in the ultrafast and ns-regime that represent record values in the commercial sector.

Keywords: 2µm; fiber laser; high power