高斯折射率分布Cu^+-Na^+离子交换玻璃波导的制备

Fabricate in Cu^+-Na^+ Ion-exchange Glass Waveguide with Index Profile of Gauss

利用Cu+ Na+ 离子交换技术制备了玻璃平面光波导 ,在 6 32 8nm波长下 ,用棱镜耦合技术测量出所制备波导的有效折射率 ,利用反WKB方法确定了平面光波导的折射率分布 ,并对折射率分布进行了函数拟合 ,近似符合高斯分布。求出了所制备玻璃平面光波导在 5 80℃的扩散系数为De ≈ 2 2 2 3× 10 -15m2 /s。

Planar optical waveguides were fabricated by Cu +-Na + ion-exchange on soda-lime glass substrate. The effective refractive index was measured by prism-coupling technique at the wavelength of 632.8 nm. Refractive index profile was determined by Inverse-WKB method. Results are compared with mathematical solutions, the best fit to the index experiment data is Gauss function. Therefore, the diffused coefficient of Cu +-Na + ion-exchange at 580℃ is D_e≈2.223×10 -15 m 2/s.