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Proceedings Paper

Effect of cathode length on the excitation efficiency of sputtering hollow cathode metal vapour lasers
Author(s): Margarita Grozeva; Diana Mihailova; Nikola Sabotinov
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Paper Abstract

The plasma in the hollow cathode discharge exhibits well-expressed axial inhomogeneity at dimensions typical for laser oscillation, which may affect the operation of the laser. To optimise the cathode dimensions for a sputtering metal vapour laser, we have measured the axial variation of cathode current and emission intensity of a number of He, Ne, Cu and Ar atom and ion lines, at different discharge conditions optimal for laser oscillation in He(He&Ar)-Cu and in Ne-Cu discharges. The observed axial excitation profiles are compared and the length of the cathode segments at which a nearly uniform discharge can be expected in He(He&Ar)-Cu and in Ne-Cu discharge is determined. Based on the results of the experiments we have demonstrated that the most efficient laser oscillation can be achieved when the laser active volume comprises a series of anodes and cathodes, each cathode with a length of ~1÷2 cm for IR and 2÷5 cm for UV laser oscillation.

Paper Details

Date Published: 22 April 2005
PDF: 5 pages
Proc. SPIE 5830, 13th International School on Quantum Electronics: Laser Physics and Applications, (22 April 2005); doi: 10.1117/12.618755
Show Author Affiliations
Margarita Grozeva, Institute of Solid State Physics (Bulgaria)
Diana Mihailova, Institute of Solid State Physics (Bulgaria)
Nikola Sabotinov, Institute of Solid State Physics (Bulgaria)

Published in SPIE Proceedings Vol. 5830:
13th International School on Quantum Electronics: Laser Physics and Applications
Peter A. Atanasov; Sanka V. Gateva; Lachezar A. Avramov; Alexander A. Serafetinides, Editor(s)

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