Optical amplification of argon excimers in the vacuum ultraviolet spectral region, produced by ultrashort-pulse high-intensity-laser-produced electrons
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- Morita, Y., Higashiguchi, T. & Kubodera, S. Appl. Phys. B (2006) 82: 31. doi:10.1007/s00340-005-1980-5
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Optical-field-induced ionization (OFI) electrons were produced in a 30 cm Ar-filled hollow fiber by shining a high-intensity laser into the fiber. By use of such a long plasma with the help of a multilayer dielectric mirror made for 126 nm emission, we observed significant optical amplification of the Ar2* emission at 126 nm. The optical amplification resulted in a maximum small signal gain coefficient of 0.16 cm-1 at 126 nm at 10 atm of Ar pressure.