Dual-color upconversion luminescence of Er³⁺-doped (0.1% mol) lithium-niobate-on-insulator (Er:LNOI) on-chip ridge waveguides is observed under the excitation of a continuous-wave 980-nm semiconductor laser, emitting both blue (at 450 nm) and green (at 528.3 nm) fluorescence emissions. The on-chip waveguides, with a propagation loss of around 3 dB/cm at 1550 nm, are fabricated by diamond blade dicing technique. The experimentally observed waveguiding modal profiles are in fairly good agreement with simulation results, indicating good quality of the fabricated waveguides. We believe this work will benefit the development of LiNbO₃-based integrated photonics.

在连续波 980 nm 半导体激光器的激发下观察到Er ³⁺掺杂（0.1% mol）铌酸锂绝缘体（Er:LNOI）片上脊波导的双色上转换发光，发射蓝色（450 nm）和绿色（528.3 nm）荧光发射。片上波导在 1550 nm 处的传播损耗约为 3 dB/cm，采用金刚石刀片切割技术制造。实验观察到的波导模态分布与模拟结果非常吻合，表明制造的波导质量良好。我们相信这项工作将有利于基于LiNbO ₃的集成光子学的发展。