Spectrally tunable high-power Yb:fiber chirped-pulse amplifier

Autor(en)

Valentina Shumakova, Vito F. Pecile, Jakob Fellinger, Michael Leskowschek, P. E. Collin Aldia, Aline S. Mayer, Lukas W. Perner, Sarper Salman, Mingqi Fan, Prannay Balla, Stéphane Schilt, Christoph M. Heyl, Ingmar Hartl, Gil Porat, Oliver H. Heckl

Abstrakt

Tailoring the properties of the driving laser to the need of applications often requires compromises among laser stability, high peak and average power levels, pulse duration, and spectral bandwidth. For instance, spectroscopy with optical frequency combs in the extreme/visible ultraviolet spectral region requires a high peak power of the near-IR driving laser, and therefore high average power, pulse duration of a few tens of fs, and maximal available spectral bandwidth. Contrarily, the parametric conversion efficiency is higher for pulses with a duration in the 100-fs range due to temporal walk-off and coating limitations. Here we suggest an approach to adjust the spectral characteristics of high-power chirped-pulse amplification (CPA) to the requirements of different nonlinear frequency converters while preserving the low-phase-noise (PN) properties of the system. To achieve spectral tunability, we installed a mechanical spectral shaper in a free-space section of the stretcher of an in-house-developed ytterbium-fiber-based CPA system. The CPA system delivers 100 W of average power at a repetition rate of 132.4 MHz. While gaining control over the spectral properties, we preserve the relative-intensity-noise and PN properties of the system. The high-power CPA can easily be adjusted to deliver either a spectrum ideal for mid-IR light generation (full width at half maximum of ∼11 nm, compressed pulse duration of 230 fs) or a spectrum ideal for highly nonlinear processes such as high-harmonic generation (−10 dB level of >50 nm, transform-limited pulse duration of ∼65 fs).

Organisation(en)

Fakultätszentrum für Nanostrukturforschung

Externe Organisation(en)

Technische Universität Wien, Deutsches Elektronen-Synchrotron DESY, Université de Neuchâtel, GSI Helmholtzzentrum für Schwerionenforschung, Helmholtz-Institute Jena, University of Alberta

Journal

Photonics Research

Band

10

Seiten

2309-2316

Anzahl der Seiten

8

ISSN

2327-9125

DOI

https://doi.org/10.1364/PRJ.465883

Publikationsdatum

10-2022

Peer-reviewed

Ja

ÖFOS 2012

103016 Laserphysik, 103021 Optik, 103040 Photonik

ASJC Scopus Sachgebiete

Electronic, Optical and Magnetic Materials, Atomic and Molecular Physics, and Optics

Link zum Portal

https://ucrisportal.univie.ac.at/de/publications/07122846-0e4b-4c5b-94e4-a02ea6dcf3b5