Optical characteristics of nanocrystallized glass fiber with second-order optical nonlinearity

Abstract

Second harmonic generation (SHG) and propagation loss have been measured on nanocrystallized optical fibers of tellurite-based glass, 15K₂O·15Nb₂O₅·70TeO₂. The result of the angular dependence of the SHG intensity is discussed based on the difference in the transmission factor varying with the polarization direction. Propagation-loss measurements on the fiber samples by a cut-back method showed low loss compared with that of a typical LiNbO₃ waveguide.