Radio-frequency excitation of waveguide CO2 lasers is proving to be a versatile technique which lends itself readily to a variety of discharge geometries such as longitudinally segmented,1 transversely pulsed,2 and a low-capacitance highly efficient device.3 The relatively short period of time required to develop a long-lived device is particularly impressive.3 In contrast to the conventional dc- excited lasers,4 the rf-excited devices have low voltage discharge arrangements and hence tend to be highly rugged by virtue of the diversely employed metallic vacuum envelope.5

© 1982 Optical Society of America

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