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

Photonics Research 2022年第10期10卷 2309-2316页

作者： 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 Christian Doppler Laboratory for Mid-IR Spectroscopy and Semiconductor Optics Faculty Center for Nano Structure ResearchFaculty of PhysicsUniversity of ViennaA-1090 ViennaAustria Photonics Institute TU WienA-1040 ViennaAustria Vienna Doctoral School in Physics University of ViennaA-1090 ViennaAustria Deutsches Elektronen-Synchrotron DESY 22607 HamburgGermany Laboratoire Temps-Fréquence Universitéde NeuchâtelCH-2000 NeuchâtelSwitzerland GSI Helmholtzzentrum für Schwerionenforschung GmbH 64291 DarmstadtGermany Helmholtz-Institute Jena 07743 JenaGermany Department of Electrical and Computer Engineering University of AlbertaEdmontonAlberta T6G 1H9Canada Department of Physics University of AlbertaEdmontonAlberta T6G 2E1Canada

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 *** 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 ***,the parametric conversion efficiency is higher for pulses with a duration in the 100-fs range due to temporal walk-off and coating *** 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 *** 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 *** CPA system delivers 100 W of average power at a repetition rate of 132.4 *** gaining control over the spectral properties,we preserve the relative-intensity-noise and PN properties of 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).

关键词： pulse power fiber

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Factor 30 Pulse Compression by Hybrid Multipass Multiplate Spectral Broadening

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Ultrafast Science 2022年第1期2卷 17-26页

作者： Marcus Seidel prannay balla Chen Li Gunnar Arisholm Lutz Winkelmann Ingmar Hartl Christoph M.Heyl Deutsches Eilektronen Synchrotron DESY Notkestrasse 8522607 HamburgGermany Helmholtz Institute Jena Frobelstieg 307743 JenaGermany GSI Helmholtzzentrum fir Schwerionenforschung GmbH Planckstrasse 164291 DarmstadtGermany FFI(Norwegian Defence Research Estabishment) P.O.Box 25NO 2027 KjellerNorway

As ultrafast laser technology advances towards ever higher peak and average powers,generating sub-50 fs pulses from laser architectures that exhibit best power-scaling capabilities remains a major ***,we present a very compact and highly robust method to compress 1.24 ps pulses to 39fs by means of only a single spectral broadening stage which neither requires vacuum parts nor custom-made *** approach is based on the hybridization of the multiplate continuum *** multipass cell spectral broadening *** combination leads to significantly higher spectral broadening factors in bulk material than what has been reported from either method ***,our approach efficiently suppresses adverse features of single-pass bulk spectral *** use a burst-mode Yb:YAG laser emitting pulses with 80 MW peak power that are enhanced to more than 1 GW after *** only 0.19%rms pulse-to-pulse energy fluctuations,the technique exhibits excellent ***,we have measured state-of-the-art spectral-spatial homogeneity and good beam quality of M^(2)=1.2 up to a spectral broadening factor of *** to the method's simplicity,compactness,and scalability,it is highly attractive for turning a picosecond laser into an ultrafast light source that generates pulses of only a few tens of femtoseconds duration.

关键词： attractive simplicity Pulse

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