Study on poling of LiNbO3 fiber single crystals

Abstract

Congruent or stoichiometric LiNbO3 fiber single crystals were grown by the μ-PD method, and the grown fiber crystals have the several (2 or 3) ridges with a diameter of 1.35-1.5 mm and a length of 40-100 mm. In this μ-PD process, different growth rates (10-60 mm/h) were applied. Pt wire or LiNbO3 crystal was used as a seed. The properties of grown LiNbO 3 fiber single crystals having a-axis or c-axis according to seeds were effected by the grown conditions(Pt tube diameter, pulling speed, after heater etc.). Disk-type LiNbO3 samples were poled in condition of DC 5 V/cm at 1050, 1075 or 1100°C. XRD, SEM, conoscope image through the polarized microscope, Tc measuring apparatus, optical transmittance measuring instrument are used to identify the properties of LiNbO3.