Optical properties of BaBPO_5 crystals

Large single crystals of BaBPO5 have been grown with Li4P2O7 as the flux by the top-seeded solution growth method. The crystal is chemically stable and easily polished and absolutely insensitive to moisture. The obtained BaBPO5 crystals are bounded by a combination of well-developed {1 0 1¯ 1} rhombohedron and {1 0 1¯ 0} hexagonal prism faces. The crystal is found to be transparent from 180 to 3300 nm. The refractive indices were measured with the minimum-deviation method and fitted to the Sellmeier equations. The nonlinear optical coefficient d11 of BaBPO5 measured by the Maker fringes technique is 0.49d36 (KDP).