Lenzini Francesco, Kasture Sachin, Haylock Ben, Lobino Mirko
Opt Express. 2015 Jan 26;23(2):1748-56. doi: 10.1364/OE.23.001748.
An anisotropic model for the fabrication of annealed and reverse proton exchange waveguides in lithium niobate is presented. We characterized the anisotropic diffusion properties of proton exchange, annealing and reverse proton exchange in Z-cut and X-cut substrates using planar waveguides. Using this model we fabricated high quality channel waveguides with propagation losses as low as 0.086 dB/cm and a coupling efficiency with optical fiber of 90% at 1550 nm. The splitting ratio of a set of directional couplers is predicted with an accuracy of ± 0.06.
提出了一种用于在铌酸锂中制造退火和反向质子交换波导的各向异性模型。我们使用平面波导表征了Z切和X切衬底中质子交换、退火和反向质子交换的各向异性扩散特性。利用该模型，我们制造出了高质量的通道波导，其在1550nm处的传播损耗低至0.086dB/cm，与光纤的耦合效率为90%。一组定向耦合器的分光比预测精度为±0.06。
