Transverse optical pumping of e-beam excited high-pressure He/Ar mixture with a laser diode array

Andrey Ionin; Aleksandr Drakin; Igor Kholin; Andrey L'dov; Gevork Mikaelyan; Dmitriy Sinitsin; Nikolay Ustinovskii; Dmitriy Zayarnyi

doi:10.1117/12.2521790

3 January 2019 Transverse optical pumping of e-beam excited high-pressure He/Ar mixture with a laser diode array

Andrey Ionin, Aleksandr Drakin, Igor Kholin, Andrey L'dov, Gevork Mikaelyan, Dmitriy Sinitsin, Nikolay Ustinovskii, Dmitriy Zayarnyi

Author Affiliations +

Proceedings Volume 11042, XXII International Symposium on High Power Laser Systems and Applications; 1104205 (2019) https://doi.org/10.1117/12.2521790
Event: XXII International Symposium on High Power Laser Systems and Applications, 2018, Frascati, Italy

Abstract

An opportunity of developing a laser with optical pumping from metastable ArI levels produced by a relativistic electron beam in high-pressure He-Ar gas mixtures was studied. It was shown that high population and long lifetime of the 1s5 level of Ar atom and broad width (~ 10 nm) of the absorption spectral line made it possible to obtain the most optimal lasing conditions in the afterglow of electron beam pulse within the classical three-level pumping scheme. Rate constants for collisional quenching of low-lying 4s-levels of excited argon atom in He-Ar mixtures in the pressure range from 4.0 to 0.75 atm were measured. An increase of photoluminescence on the 2p₁₀-1s₅ transition (912.3 nm) upon application of transverse optical pumping with a laser diode array (811.5 nm) was observed. An application of a semi-transparent cavity resulted in a significant increase of this photoluminescence signal in the afterglow indicating amplified spontaneous emission.

Citation Download Citation

Andrey Ionin, Aleksandr Drakin, Igor Kholin, Andrey L'dov, Gevork Mikaelyan, Dmitriy Sinitsin, Nikolay Ustinovskii, and Dmitriy Zayarnyi "Transverse optical pumping of e-beam excited high-pressure He/Ar mixture with a laser diode array", Proc. SPIE 11042, XXII International Symposium on High Power Laser Systems and Applications, 1104205 (3 January 2019); https://doi.org/10.1117/12.2521790

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