Growth and optical properties of a new nonlinear optical lanthanum calcium borate crystal

摘要

The monoclinic lanthanum calcium borate La_2CaB_10O_19 (LCB) crystal was grown from its stoichiometric melt by the top-seeded pulling method. The unpolarized transmission spectrum of a 1-mm-thick (0 0 1)-cut LCB crystal was measured in the wavelength range of 190-3100 nm. The crystal exhibited a high transmittance (>80/100) and a short absorption edge (<190 nm). The phase-matched second-harmonic generation (SHG) properties within the (0 1 0) plane of a 1.7-mm-thick (0 0 1)-cut LCB crystal were studied for the first time with a Spectra-Physics 3900S Ti:sapphire CW tunable laser.