Established waveguide fabrication technologies on lithium niobate (LN) and potassium titanyl phosphate (KTP) were revisited, and a comparative analysis of their performance for type-0 quasi-phase matched second-harmonic generation at 1.55 µm was provided based on literature data and our simulations. This analysis aided identifying gaps where the waveguide performance is below the theoretical predictions, and the possible reasons are discussed. It provides the reader with a roadmap for choosing the most appropriate waveguide type and material choice between LN and KTP for desired performance of targeted applications.

中文翻译：

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用于非线性频率转换的铌酸锂和 KTP 准相位匹配波导：比较

重新审视了铌酸锂 (LN) 和磷酸氧钛钾 (KTP) 上已建立的波导制造技术，并根据文献数据提供了它们在 1.55 µm处产生 0 型准相位匹配二次谐波的性能的比较分析和我们的模拟。该分析有助于确定波导性能低于理论预测的差距，并讨论了可能的原因。它为读者提供了一个路线图，用于在 LN 和 KTP 之间选择最合适的波导类型和材料，以实现目标应用的所需性能。