Journal Article

PUBDB-2022-07835

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Spectrally tunable high-power Yb:fiber chirped-pulse amplifier

Shumakova, V. (Corresponding author) ; Pecile, V. F. ; Fellinger, J.Extern* ; Leskowschek, M. ; Aldia, P. E. C. ; Mayer, A. S. ; Perner, L. W. ; Salman, S.Extern*DESY* ; Fan, M.DESY* ; Balla, P.DESY* ; Schilt, S. ; Heyl, C. M.DESY* ; Hartl, I.DESY* ; Porat, G. ; Heckl, O.Extern*

2022
Optica Washington, DC

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Please use a persistent id in citations: doi:10.1364/PRJ.465883  doi:10.3204/PUBDB-2022-07835

Abstract: 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).

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Contributing Institute(s):

1. Laser Forschung und Entwicklung (FS-LA)

Research Program(s):

1. 631 - Matter – Dynamics, Mechanisms and Control (POF4-631) (POF4-631)

Experiment(s):

1. No specific instrument

Appears in the scientific report 2022

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Database coverage:
; ; ; Clarivate Analytics Master Journal List ; Current Contents - Engineering, Computing and Technology ; Current Contents - Physical, Chemical and Earth Sciences ; Essential Science Indicators ; IF >= 5 ; JCR ; SCOPUS ; Science Citation Index Expanded ; Web of Science Core Collection

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