铌酸锂
材料科学
光学
消光比
极化(电化学)
分路器
分束器
氮化硅
光电子学
绝缘体上的硅
功率分配器和定向耦合器
波导管
硅
插入损耗
光束传播法
折射率
波长
物理
物理化学
化学
激光器
作者
Daohan Ge,Mengcheng Lv,Jiakang Shi,Yujie Zhou,Guihua Cui,Liqiang Zhang
出处
期刊:Optical Engineering
[SPIE - International Society for Optical Engineering]
日期:2022-12-09
卷期号:61 (12)
标识
DOI:10.1117/1.oe.61.12.125102
摘要
A polarization beam splitter (PBS) is proposed based on an asymmetric directional coupler consisting of a silicon nitride assisted waveguide and two ridge waveguides on a lithium niobate on insulator. Due to the silicon nitride buffer layer, the phase-matching condition is satisfied for TE polarization, whereas TM polarization has a significant phase mismatch by choosing reasonable widths of three waveguides. A 112.2-μm-long PBS is designed, and the gap width is chosen to be 300 nm to make it easy to fabricate. Numerical simulations show that the designed PBS has a broad bandwidth (>80 nm) for an extinction ratio of >15 dB and an ultralow insertion loss (<0.35 dB).
科研通智能强力驱动
Strongly Powered by AbleSci AI