Current Trends in the Creation of High-Energy Repetitively Pulsed Continuous Wave Lasers

The current trends in the creation of high-energy repetitively pulsed continuous wave lasers with pulse energies of tens and hundreds of joules are considered. Active media are analyzed for their use in such lasers. The Yb:YAG active crystalline and ceramic elements produced in Russia are experiment...

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Bibliographic Details
Published in:Doklady. a journal of the Russian Academy of Sciences. Physics 2023-12, Vol.68 (12), p.401-409
Main Authors: Garanin, S. G., Derkach, V. N., Makarov, K. N., Ostrovsky, V. A., Pergament, M. I., Putilin, M. V., Sizmin, D. V.
Format: Article
Language:English
Subjects:
Classical Mechanics
Continuous wave lasers
Cooling systems
Cryogenic cooling
Cryopumping
Mathematical and Computational Physics
Physics
Physics and Astronomy
Spontaneous emission
Theoretical
Trends
YAG lasers
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Summary:The current trends in the creation of high-energy repetitively pulsed continuous wave lasers with pulse energies of tens and hundreds of joules are considered. Active media are analyzed for their use in such lasers. The Yb:YAG active crystalline and ceramic elements produced in Russia are experimentally studied at temperatures from 100 to 295 K. The data of the cryogenic cooling system for active elements are presented. A diode pumping system for active elements and a homogenizer for its emission are described. The physical and technical characteristics of the pumping system are given. Fresnel losses, absorption losses, and losses due to enhanced spontaneous emission, which reduce the energy stored in the inverse population, are measured experimentally. The results of measuring the gain in multi-pass circuits with different sets of active elements are presented.
ISSN:1028-3358
1562-6903
DOI:10.1134/S1028335823120029