Highly compact 2x2 multimode interference coupler in silicon photonic nanowires for array waveguide grating demodulation integration microsystem

Authors

Hongqiang Li, Tianjin Polytechnic UniversityFollow
Xiaye Dong, Tianjin Polytechnic University
Enbang Li, University of SydneyFollow
Zhihui Liu, Tianjin Polytechnic UniversityFollow
Yaoting Bai, Tianjin Polytechnic University

RIS ID

107872

Publication Details

Li, H., Dong, X., Li, E., Liu, Z. & Bai, Y. (2013). Highly compact 2x2 multimode interference coupler in silicon photonic nanowires for array waveguide grating demodulation integration microsystem. Optics and Laser Technology, 47 366-371.

Abstract

A highlycompact2x2 multimodeinterference(MMI)couplerbasedonsilicon-on-insulatorthatcanbe used inanarraywaveguidegratingdemodulationintegrationmicrosystemisdesigned.Thecoupleris simulatedusingthebeampropagationmethod.Taperwaveguidesareusedasinput/outputwave- guides. ThefootprintoftheMMIregionisonly6 mmx57 mm.Theexcesslossis0.46dB,andthe uniformityis0.06dBwithtransverseelectricpolarizationwhenthecenterwavelengthis1.55 mm. The maximumexcesslossis1.55dBintherangeof1.49 mm-1.59 mm.Thesimulationresultsshowthat a small2x2 MMIcouplerexhibitslowexcessloss,widebandwidth,andgooduniformitysuitablefor the requirementsofthesystemonchip.