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On the super-Gaussian unstable resonators for high-gain short-pulse laser media

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3 Author(s)
Perrone, Maria Rita ; Dipartimento di Fisica, Lecce Univ., Italy ; Piegari, Angela ; Scaglione, Salvatore

High-mode-volume, high-energy (70-mJ), high-brightness (1.6×1014 W cm-2 Sr-1) laser beams have been extracted from a high-gain short-pulse XeCl laser with a super-Gaussian unstable resonator. These results are obtained by increasing the cavity magnification factor to 6.6 and the output mirror peak reflectivity to 78%. The output beam divergence is seen to decrease from an initial value of ~0.2 mrad down to nearly diffraction limited after 6 ns for the short gain build-up time of the active medium

Published in:

Quantum Electronics, IEEE Journal of  (Volume:29 ,  Issue: 5 )