Experimental investigation of population inversion of oxygen-ion levels

Journal Article · Tue Jul 01 04:00:00 EDT 1986 · J. Sov. Laser Res.; (United States)

DOI:https://doi.org/10.1007/BF01120144· OSTI ID:7019111

Korukhov, V V; Nikulin, N G; Troshin, B I

Experimental results are reported of investigations of the optical properties of the plasma produced when an Al/sub 2/O/sub 3/ target is irradiated in vacuum by a high-power neodymium-glass laser system. It is shown that a number of O VIII and O VII ion levels with principal quantum numbers n = 2, 3, 4 are inversely populated. The gain at the wavelength lambda approx. = 29 nm (4 ..-->.. 3 transition, OVIII) under the experimental conditions is of the order of about 0.01 cm/sup -1/. For the helium like ions O VII, in a transition with the same principal quantum numbers (1s4p/sup 1/P/sub 1/ ..-->.. 1s3s/sup 1/S/sub 0/, lambda approx. = 36.9 nm), the gain is of the order of about 10/sup -2/-10/sup -1/ cm/sup -1/, depending on the electron density.

• OSTI ID: 7019111
• Journal Information: J. Sov. Laser Res.; (United States), Journal Name: J. Sov. Laser Res.; (United States) Vol. 7:4; ISSN JSLRD
• Country of Publication: United States
• Language: English

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75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ALUMINIUM COMPOUNDS
ALUMINIUM OXIDES
CHALCOGENIDES
CHARGED PARTICLES
ELEMENTS
ENERGY LEVELS
IONIZATION
IONS
LASER TARGETS
LASER-PRODUCED PLASMA
LASERS
NEODYMIUM LASERS
NONMETALS
OPTICAL PROPERTIES
OXIDES
OXYGEN
OXYGEN COMPOUNDS
OXYGEN IONS
PHYSICAL PROPERTIES
PLASMA
PLASMA PRODUCTION
POPULATION INVERSION
SOLID STATE LASERS
TARGETS