A compact 20-pass thin-disk multipass amplifier stable against thermal lensing effects and delivering 330 mJ pulses with $\bf{M^2 < 1.17}$ - Archive ouverte HAL Accéder directement au contenu
Pré-Publication, Document De Travail Année : 2023

A compact 20-pass thin-disk multipass amplifier stable against thermal lensing effects and delivering 330 mJ pulses with $\bf{M^2 < 1.17}$

Manuel Zeyen
  • Fonction : Auteur
Lukas Affolter
  • Fonction : Auteur
Marwan Abdou Ahmed
  • Fonction : Auteur
Thomas Graf
  • Fonction : Auteur
Oguzhan Kara
  • Fonction : Auteur
Klaus Kirch
  • Fonction : Auteur
Miroslaw Marszalek
  • Fonction : Auteur
François Nez
Ahmed Ouf
  • Fonction : Auteur
Randolf Pohl
  • Fonction : Auteur
Siddharth Rajamohanan
  • Fonction : Auteur
Karsten Schuhmann
  • Fonction : Auteur
Aldo Antognini
  • Fonction : Auteur

Résumé

We report on an Yb:YAG thin-disk multipass amplifier delivering 50 ns long pulses at a central wavelength of 1030 nm with an energy of 330 mJ at a repetition rate of 100 Hz. The beam quality factor at the maximum energy was measured to be $\text{M}^2 = 1.17$. The small signal gain is 20, and the gain at 330 mJ was measured to be 6.9. The 20-pass amplifier is designed as a concatenation of stable resonator segments in which the beam is alternately Fourier transformed and relay-imaged back to the disk by a 4f-imaging optical scheme stage. The Fourier transform propagation makes the output beam robust against spherical phase front distortions, while the 4f-stage is used to compensate the thermal lens of the thin-disk and to reduce the footprint of the amplifier.

Dates et versions

hal-04284749 , version 1 (14-11-2023)

Identifiants

Citer

Manuel Zeyen, Lukas Affolter, Marwan Abdou Ahmed, Thomas Graf, Oguzhan Kara, et al.. A compact 20-pass thin-disk multipass amplifier stable against thermal lensing effects and delivering 330 mJ pulses with $\bf{M^2 < 1.17}$. 2023. ⟨hal-04284749⟩
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