Recent advancement on UV light generation by nonlinear optical borate crystals in Osaka University

We review optical properties of borate crystals CsLiB/sub 6/O/sub 10/, Gd/sub x/Y/sub 1-x/Ca/sub 4/O(BO/sub 3/)/sub 3/, CsB/sub 3/O/sub 5/, K/sub 2/Al/sub 2/B/sub 2/O/sub 7/, and BaAlBO/sub 3/F/sub 2/, which possess superior properties for UV light generation. The latest crystal growth and recent progress in UV light generation are also presented.