Development of new NLO borate crystals

Interests in the use of borate crystals in ultraviolet nonlinear optics hav e increased because all-solid-state UV lasers obtained with NLO crystals ar e in highly demand for scientific and industrial applications. Recently, ne w borate crystals, CsLiB6O10 and GdxY1-xCa4O(BO3)(3) have been developed by the present authors. CsLiB6O10 is for fourth- and fifth-harmonic generatio ns of Nd:YAG laser, GdxY1-xCa4O(BO3)(3) for third-harmonic generation. This paper reviews the growth and nonlinear optical properties of these new bor ate crystals and the progress in UV light generation.