Analysis of the impedance of a coaxial, large-bore copper-vapor laser

Author

Blau, Pinhas

Author_Institution

Laser Dept., Nuclear Res. Center-Negev, Beer-Sheva, Israel

Volume

30

Issue

3

fYear

1994

fDate

3/1/1994 12:00:00 AM

Firstpage

763

Lastpage

769

Abstract

The impedance of the laser head of a 100-W copper-vapor laser is investigated. The laser head is of a coaxial geometry, which is commonly used for longitudinally electrically excited, pulsed-gas lasers. The plasma conductivity is estimated using the available data on plasma parameters. The effect of radial gradient of the gas temperature and electron density is considered. The tube inductance and capacitance are estimated and the combined effect is demonstrated. The skin effect is considered. A method to calculate the exact influence of the skin effect on the tube impedance is presented. The full calculation procedure is demonstrated for the case of a 100-W, 8-cm-diameter, copper-vapor laser. The consequent impedance is used to calculate the laser current under given excitation conditions. Very good agreement exists between the calculated and measured laser current. The metal-sleeve diameter is found that is optimal for power matching

Keywords

copper; gas lasers; laser theory; 100 W; 8 cm; Cu; Cu vapour lasers; capacitance; coaxial; coaxial geometry; copper-vapor laser; electron density; gas temperature; large-bore; laser current; laser head; longitudinally electrically excited; metal-sleeve diameter; plasma conductivity; plasma parameters; power matching; pulsed-gas lasers; radial gradient; skin effect; tube impedance; tube inductance; Coaxial components; Conductivity; Gas lasers; Geometrical optics; Impedance; Laser excitation; Optical pulses; Plasma density; Plasma temperature; Skin effect;

fLanguage

English

Journal_Title

Quantum Electronics, IEEE Journal of

Publisher

ieee

ISSN

0018-9197

Type

jour

DOI

10.1109/3.286165

Filename

286165