Abstract
Crystallization behaviors of Gd203-Bi203-B203glasses were investigated to clarify the relation between precipitated crystalline phases and second harmonic (SH) intensity. The transparent surface crystallized glasses with a crystalline layer of about 7μm were successfully fabricated by annealing at temperatures in the glass transition region, and relatively strong SH intensities were observed. Crystals with two different morphologies (plate and needle shapes) were detected in polarized optical microscope observations, suggesting the formation of different nonlinear optical crystalline phases.
