Measurements of active-medium parameters in sputtered hollow cathode discharge (HCD) copper ion lasers

Tadeusz M. Adamowicz; Jaroslaw Groszyk; Frank E. K. Rodenburg

doi:10.1117/12.203306

1 March 1995 Measurements of active-medium parameters in sputtered hollow cathode discharge (HCD) copper ion lasers

Tadeusz M. Adamowicz, Jaroslaw Groszyk, Frank E. K. Rodenburg

Proceedings Volume 2202, Laser Technology IV: Research Trends, Instrumentation, and Applications in Metrology and Materials Processing; (1995) https://doi.org/10.1117/12.203306
Event: Laser Technology: Fourth Symposium, 1993, Szczecin, Poland

Abstract

Lasing properties of active media in hollow cathode discharge (HCD) He-Cu lasers operating on 780.8 nm line have been investigated for different kinds of hollow cathode geometries. Direct measurements of unsaturated and saturated gain, optical losses in the laser cavity and laser output power vs. resonator coupling carried over the wide range of excitation and filling conditions enable us to compare different laser media. The highest small-signal gains equal to 40%/m for a 2.5 X 6 mm rectangular slot cathode and 43%/m for a 3 mm I.D. helical cathode have been found within the pressure range where the most efficient hollow cathode effect occurs. From gain vs. oscillator intensity dependence, the saturation intensities have been calculated for a homogeneously broadened line. They increase linearly with helium pressure, hence more efficient laser operation can be obtained at higher pressures than required for the highest gain.

Citation Download Citation

Tadeusz M. Adamowicz, Jaroslaw Groszyk, and Frank E. K. Rodenburg "Measurements of active-medium parameters in sputtered hollow cathode discharge (HCD) copper ion lasers", Proc. SPIE 2202, Laser Technology IV: Research Trends, Instrumentation, and Applications in Metrology and Materials Processing, (1 March 1995); https://doi.org/10.1117/12.203306

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