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Efficient high-power UV generation by use of a resonant ring driven by a cw mode-locked IR laser

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Abstract

We use a single cavity in which the second harmonic is resonant to first double and then quadruple the IR input. The cavity is powered by a 15-W cw mode-locked Nd:YLF laser. We generate intermittent 263-nm average powers as high as 6.7 W for ηIR→UV = 45%. Absorption of 527-nm radiation in the β-barium borate crystal degrades the performance during continuous operation. The highest continuous average UV power produced is 2.9 W (simultaneously; 3.6 W of 527-nm light is output).

© 1993 Optical Society of America

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