Commercial terawatt femtosecond laser-driven tabletop x-ray lasers in gases

Peixiang Lu; Hidetoshi Nakano; Tadashi Nishikawa; Naoshi Uesugi

doi:10.1117/12.375121

11 January 2000 Commercial terawatt femtosecond laser-driven tabletop x-ray lasers in gases

Peixiang Lu, Hidetoshi Nakano, Tadashi Nishikawa, Naoshi Uesugi

Proceedings Volume 3886, High-Power Lasers in Energy Engineering; (2000) https://doi.org/10.1117/12.375121
Event: Advanced High-Power Lasers and Applications, 1999, Osaka, Japan

Abstract

Table-top x-ray lasers driven by a commercial terawatt (TW) femtosecond laser in gases such as N₂, O₂, SF₆, and Kr are investigated. X-ray lasing to the ground state in low-charged nitrogen and oxygen ions is successfully demonstrated using a commercial TW femtosecond laser system by optical-field ionization. Small signal gain coefficients of 9.6 cm^-1 for the NIII 3s(²S)-2p)²P) transition at 45.2 nm and 11.7 cm^-1 for the OIII 2p3s(³P)-2p²(³P) transition at 37.4 nm x-ray lasers are achieved for a linearly-polarized 100-fs pump laser pulse of 25 mJ. Four models that includes the monopole collisional excitation and radiation trapping effects in neon-like S and nickel-like Kr ions were built and gains for neon-like S 3p-3s and nickel-like Kr 4d-4p transitions were calculated in SF₆ and Kr gases with different gas pressures. Calculations yield positive prospects for table- top neon-like S and nickel-like Kr ion x-ray lasers driven by a 1-TW circularly-polarized 100-fs laser pulse.

Citation Download Citation

Peixiang Lu, Hidetoshi Nakano, Tadashi Nishikawa, and Naoshi Uesugi "Commercial terawatt femtosecond laser-driven tabletop x-ray lasers in gases", Proc. SPIE 3886, High-Power Lasers in Energy Engineering, (11 January 2000); https://doi.org/10.1117/12.375121

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