We demonstrate KTiOAsO₄ (KTA) ridge optical waveguides by precise diamond blade dicing of ion-irradiated planar waveguides. The guiding and spectroscopic properties of ridge waveguides have been investigated. The original properties of the z-cut KTA crystal have been well preserved in the ion-irradiation area. Under optical excitation of a 1064-nm pulsed laser, second harmonic generation (SHG) of green laser at 532 nm is generated from waveguide structures, demonstrating a maximum output power of 1.71 mW and a SHG conversion efficiency of 4.28%. The results in this work suggest promising applications of diamond blade diced KTA waveguides in integrated photonics and nonlinear optics.

我们通过对离子辐照平面波导进行精确的金刚石刀片切割来展示 KTiOAsO ₄ (KTA) 脊形光波导。研究了脊形波导的引导和光谱特性。z- cut KTA晶体的原始特性在离子辐照区得到了很好的保存。在 1064 nm 脉冲激光的光激发下，波导结构产生 532 nm 绿色激光的二次谐波 (SHG)，最大输出功率为 1.71 mW，SHG 转换效率为 4.28%。这项工作的结果表明金刚石刀片切割 KTA 波导在集成光子学和非线性光学中的应用前景广阔。