Location selectively crystallization of samarium dopred glass by laser irradiation

Abstract

β-BaB₂O₄(β-BBO) crystallines with second-order optical nonlinearity have been successfully fabricated at the surface of rare earth (Sm³⁺ and Dy³⁺) doped barium borate glasses by continuous irradiations of Nd:YAG laser. The induced crystalline phase was confirmed to be β-BBO in XRD measurements, and reratively strong second harmonic generation from the phase was clearly observed. In addition, we measured second harmonic waves by second harmonic microscope (SHM) and found the uniform intensity for whole length of the crystal lines.