Abstract
Beta-barium borate has recently been shown to be an effective nonlinear crystal for high-power cw intracavity frequency doubling of the blue-green argon laser lines.1 In BBO, generation of even shorter wavelengths into the vacuum ultraviolet cannot be achieved by second-harmonic generation, but can be accomplished by sum frequency mixing of ultraviolet and infrared inputs, using Type I phasematching. The recent demonstration of noble gas ion lasers providing moderate output power at a number of deep-UV wavelengths makes it possible to develop cw VUV sources of useful power using only one nonlinear step. We report here results of our initial experiments toward this end.
© 1993 Optical Society of America
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