Photonics

Discharge KrF laser with high specific radiation energy

Yu. N. Panchenko^a, A. V. Puchikin^a, S. A. Yampol'skaya^a, M. V. Andreev^a, E. V. Gorlov^b, V. I. Zharkov<sup>b

a</sup> Institute of High Current Electronics, Siberian Branch of the Russian Academy of Sciences, Tomsk, Russia
^b Institute of Atmospheric Optics, Siberian Branch of the Russian Academy of Science, Tomsk, Russia

Abstract: Results of experimental and numerical studies of an electric-discharge KrF laser with a specific pump power of 3.5 and 7 MW/cm$^3$ are presented; in this case, lasing was obtained with a specific radiation pulse energy of $\sim$6 and 9.5 J/l, with an internal energy efficiency of $\sim$4%. Time dependences of the formation of charged and excited particles in a dense excimer plasma with an electron concentration of ne $\sim$10$^{16}$ cm$^{-3}$ are shown. Conditions for the effective operation of the laser are proposed, which will make it possible to ensure a further increase in the specific radiation energy by more than two times while maintaining the high internal efficiency of the laser relative to the energy deposited into the discharge.

Keywords: KrF laser, diffuse discharge, specific pump power, specific radiation pulse energy, laser efficiency.

Received: 11.02.2022
Revised: 16.03.2022
Accepted: 02.04.2022

DOI: 10.21883/JTF.2022.06.52516.32-22

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