【摘要】 基于偏振无关光分束器和模式转换器，提出一种基于薄膜铌酸锂（TFLN）的偏振无关电光调制器。其中，偏振无关光分束器可以实现TE₀和TM₀模式的精准分束，模式转换器能够将输入的TM₀模式高效转换为TE₁模式。在此基础上，使用周期性电容加载的行波电极结构可实现对两种模式光的高效电光调制。仿真结果表明，该调制器的电光带宽大于100 GHz，有助于解决现有电光调制器因偏振敏感而导致的不稳定问题，为基于TFLN的调制器开辟了新的研究思路。更多还原

【Abstract】 A polarization-independent electro-optical modulator based on thin-film lithium niobate （TFLN） is proposed;it is based on a polarization-independent beam splitter and a mode converter.The polarization-independent beam splitter achieves precise beam splitting of TE₀ and TM₀ modes,whereas the mode converter efficiently converts the input TM₀mode to TE₁ mode.Accordingly,the traveling-wave electrode structure loaded with periodic capacitors achieves efficient electro-optical modulation of two light modes.The simulation results show that the electro-optical bandwidth of the modulator is greater than 100 GHz.This helps solve the instability problem caused by polarization sensitivity in existing electro-optical modulators and opens up new research lines for TFLN-based modulators.更多还原