Masuda M, Koyama J
Appl Opt. 1977 Nov 1;16(11):2994-3000. doi: 10.1364/AO.16.002994.
The effects of a buffer layer on the TM modes in a Ti-diffused LiNbO(3)C plate optical waveguide with metal cladding are described by examining the transverse load impedance. The loss reduction, the absorption peak, and the mode transformation of the TM modes in the metal-clad diffused waveguide with respect to the thickness of a SiO(2) buffer film are clarified by the numerical solutions of the dispersion equations. The Ti-diffused region of the waveguide is assumed to be well represented by a region with a permittivity that decreases linearly away from the waveguide surface.
通过研究横向负载阻抗，描述了缓冲层对具有金属包层的钛扩散铌酸锂（LiNbO₃C）平板光波导中TM模式的影响。通过色散方程的数值解，阐明了具有金属包层的扩散波导中TM模式相对于SiO₂缓冲膜厚度的损耗降低、吸收峰和模式转换。假设波导的钛扩散区域可以很好地用一个介电常数从波导表面线性降低的区域来表示。
