电场辅助离子扩散过程中玻璃基片的电导变化

Electric conductance variation of glass substrate in the process of field-assisted ion-diffusion

实验研究了玻璃基片在电场辅助离子扩散过程中的电导变化规律。结果发现,由于直流电场在玻璃基片中产生的焦耳热效应,离子扩散过程中玻璃基片的温度会明显升高,玻璃基片的电导也按照相应的规律变化;在通常的离子扩散制备掩埋式光波导的过程中,玻璃基片电导值可以增加到初始值的数倍;这种玻璃基片温度及伴随的电导变化,会给玻璃基离子交换光波导制备工艺带来不可忽略的影响。

Electric conductance variation of glass substrate in the process of field-assisted ion-diffusion is experimentally investigated.Experimental results show that glass substrate temperature and corresponding electric conductance experience an increasing process before reaching a constant value.In conventional ion-diffusion process for glass-based waveguide manufacturing,electric conductance increases by several times over its original value.This temperature rise and corresponding electric conductance increment could impose non-negligible influence on glass-based ion-exchange waveguide manufacturing.