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  • 1
    ISSN: 1432-0649
    Keywords: 42.55 ; 52.25 ; 52.80
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract Population densities of excited Cu II-levels between 16 and 25 eV in Cu−He hollow cathode discharges were determined by emission spectroscopy. Population inversion was detected for several 6s-4p transitions. Investigation of the enhancement of Cu II vuv lines in He compared to Ne discharges showed that the excitation of the 6s levels by charge transfer is up to 100 times higher in He than in pure Ne discharges. Using the population densities and known transition probabilities, a single pass gain of 55% m−1 at 780.8 nm and 1.2% m−1 at 154.17 nm at a current density of 0.4 A cm−2 was calculated.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Springer
    Applied physics 26 (1981), S. 49-56 
    ISSN: 1432-0649
    Keywords: 42.55 ; 52.80
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The cw output power of the uv CuII laser has been optimized with respect to the hollow cathode geometry, the discharge current, the fill gas pressure and the resonator mirror parameters. A maximum laser output power of 900 mW for multiline operation at 248.6, 259.1, 260.0, and 270.3 nm was achieved with 100 A discharge current, 260 V voltage and 16 mbar fillgas pressure, when a hollow cathode of 1.2 m length and 2×6 mm2 cross section was employed. The single-pass pain gl has been estimated to 7%. A hollow cathode cross section of 1.5×4.5 mm2 is suggested as an optimum geometry. In addition, some investigations on the mechanism of the laser power decay in Ne−Cu-discharges are presented.
    Type of Medium: Electronic Resource
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