Phase-matching properties of nonlinear crystals in deep ultraviolet

We at present, can use a few nonlinear crystals such as LiB3O5 (LBO), CsLiB6O10 (CLBO), KBe2BO3F2 (KBBF) in deep ultraviolet (DUV) below 200 nm. Since the properties of these crystals have not been theoretically investigated in deep ultraviolet, we have performed the calculations of the frequency doubling, sum frequency phase matching and effective nonlinear coefficients of LBO, CLBO and KBBF crystals in DUV waveband. We have also investigated the possibility of DUV output generation in these crystals.