Abstract

High pulse energies of nanosecond-level fourth- and fifth-harmonic (4ω and ) generation of a Nd:YAG laser have been obtained with a CsLiB6O10 (CLBO) nonlinear crystal. 500 mJ of 4ω output with a conversion efficiency of 50% from the second-harmonic input was generated. 5ω output at 213 nm of as high as 230 mJ was obtained by sum-frequency generation of the 266- and 1064-nm beams, corresponding to a 10.4% conversion efficiency of the initial fundamental input energy. The characteristics of the CLBO crystal that permit this effective frequency conversion are discussed.

© 1996 Optical Society of America

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