Chinese Optics Letters, 2017, 15 (4): 041301, Published Online: Jul. 25, 2018
Low-crosstalk silicon photonics arrayed waveguide grating Download: 876次
Abstract
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.
Zhiqun Zhang, Juan Hu, Hua Chen, Fangjiang Li, Lei Zhao, Jinbin Gui, Qing Fang. Low-crosstalk silicon photonics arrayed waveguide grating[J]. Chinese Optics Letters, 2017, 15(4): 041301.