Low-crosstalk silicon photonics arrayed waveguide grating

• 来源期刊: 中国光学快报（英文版）
• 年，卷（期）: 2017,（4）
• 页码范围: 39-42
• 页数: 4页
• 语种: 英文
• DOI: 10.3788/COL201715.041301

摘要

In this Letter,we demonstrate a 1 × 4 low-crosstalk silicon photonics cascaded arrayed waveguide grating,which is fabricated on a silicon-on-insulator wafer with a 220-nm-thick top silicon layer and a 2 μm buried oxide layer.The measured on-chip transmission loss of this cascaded arrayed waveguide grating is ～4.0 dB,and the fiber-to-waveguide coupling loss is 1.8 dB/facet.The measured channel spacing is 6.4 nm.The adjacent crosstalk by characterization is very low,only-33.2 dB.Compared to the normal single silicon photonics arrayed waveguide grating with a crosstalk of ～-12.5 dB,the crosstalk of more than 20 dB is dramatically improved in this cascaded device.