论文标题
宽带低损失和超低串扰波导横梁基于多模干涉仪的840 nm操作
Broadband low loss and ultra-low crosstalk waveguide crossings based on multimode interferometer for 840 nm operation
论文作者
论文摘要
宽带低损耗和超低串扰波导交叉点是光子整合电路的关键成分，可以使功能组件的更高集成密度和布局的灵活性提高。我们报告了基于多模层干涉仪结构的优化氮化硅波导横梁的设计，用于在790 nm至890 Nm的近红外波长区域中TE/TE-TE-like，TM/TM样和TE/TM类似TE/TM类似TE/TM样光线。各种极化模式的穿越设计有助于单个芯片上的双极化操作。对于所有配置，单个交叉的损失在840 nm时测量为0.05 dB。在100 nm的带宽损失中，损失保持在0.16 dB以下。通过3D有限差时域模拟，估计该串扰的速度为-60 dB。
Broadband low loss and ultra-low crosstalk waveguide crossings are a crucial component for photonic integrated circuits to allow a higher integration density of functional components and an increased flexibility in the layout. We report the design of optimized silicon nitride waveguide crossings based on multimode interferometer structures for intersecting light paths of TE/TE-like, TM/TM-like and TE/TM-like polarized light in the near infrared wavelength region of 790 nm to 890 nm. The crossing design for diverse polarization modes facilitates dual polarization operation on a single chip. For all configurations the loss of a single crossing was measured to be 0.05 dB at 840 nm. Within the 100 nm bandwidth losses stayed below 0.16 dB. The crosstalk was estimated to be on the order of -60 dB by means of 3D finite difference time domain simulations.
