A comprehensive study of second and third harmonic conversion efficiency, angular and temperature tolerance and long-term stability in lithium triborate crystals using a 10-J-class laser

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68378271%3A_____%2F25%3A00644952" target="_blank" >RIV/68378271:_____/25:00644952 - isvavai.cz</a>
Result on the web
<a href="https://hdl.handle.net/11104/0374787" target="_blank" >https://hdl.handle.net/11104/0374787</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1017/hpl.2025.10067" target="_blank" >10.1017/hpl.2025.10067</a>

Result language
angličtina
Original language name
A comprehensive study of second and third harmonic conversion efficiency, angular and temperature tolerance and long-term stability in lithium triborate crystals using a 10-J-class laser
Original language description
We present a study of second harmonic generation (SHG) and third harmonic generation (THG) in lithium triborate (LBO) crystals using a high-energy, 10-J-class, 10 Hz ytterbium-doped yttrium aluminum garnet laser system. We achieved high conversion efficiencies of 75% for SHG and 56% for THG for Gaussian-like temporal pulse shapes and top-hat-like beam profiles. The angular and temperature dependence of the LBO crystals was measured and validated through numerical simulations. The SHG process exhibited an angular acceptance bandwidth of 1.33 mrad and a temperature acceptance bandwidth of 2.61 K, while the THG process showed 1.19 mrad and 1.35 K, respectively. In addition, long-term stability measurements revealed root mean square energy stabilities of 1.3% for SHG and 1.24% for THG. These results showcase the reliability of LBO crystals for high-energy, high-average-power harmonic generation. The developed system offers automated switching between harmonics provided at the system output. The system can be easily adapted to neodymium-doped yttrium aluminum garnet based pump lasers as well.
Czech name
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Czech description
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Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
10306 - Optics (including laser optics and quantum optics)

Project
Result was created during the realization of more than one project. More information in the Projects tab.
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year
2025
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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