Discharge Behaviour Of A RF Excited High Power CO[sub]2[/sub] Laser At Different Excitation Frequencies

Peter Hoffmann

doi:10.1117/12.938074

21 October 1986 Discharge Behaviour Of A RF Excited High Power CO₂ Laser At Different Excitation Frequencies

Peter Hoffmann

Proceedings Volume 0650, High Power Lasers and Their Industrial Applications; (1986) https://doi.org/10.1117/12.938074
Event: 1986 International Symposium/Innsbruck, 1986, Innsbruck, Austria

Abstract

In the last few years it has become common knowledge that the RF excitation of high power CO₂ lasers has some advantages over DC excitation with respect to their discharge physics. To introduce these advantages into a laser system to make it an interesting product for a wealth of applications, a lot of different technical aspects have to be considered. One of the most important parameters for the technical embodiment of such a RF excited laser is the excitation frequency because it determines the type of RF generator, the impedance matching system, the type of energy coupling into the discharge, and last but not least the discharge physics themselves. In this work these problems will be examined in some detail with respect to the basic processes as well as to the technical realization. The experimental verification of the mechanisms one could expect theoretically was carried out, using a transverse flow CO₂ laser with different excitation frequencies in the range of 20 to 150 kHz (in the following called AC) and at two frequencies in the RF range: 13.5 MHz and 27 MHz. An extrapolation up to the microwave range (2.45 GHz) was tried, based on earlier theoretical and experimental work done by the author.

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Peter Hoffmann "Discharge Behaviour Of A RF Excited High Power CO₂ Laser At Different Excitation Frequencies", Proc. SPIE 0650, High Power Lasers and Their Industrial Applications, (21 October 1986); https://doi.org/10.1117/12.938074

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