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Published on: September 25, 2020
Experimental demonstration of an ultracompact Si-nanowire-based reflective arrayed-waveguide grating (de)multiplexer
Daoxin Dai1, Xin Fu, Yaocheng Shi
1Centre for Optical and Electromagnetic Research, State Key Laboratory for Modern Optical Instrumentation,East Building No.5, Zijingang Campus, Zhejiang University, Hangzhou 310058, China. dxdai@zju.edu.cn
Abstract:
An ultracompact reflective arrayed-waveguide grating (AWG) (de)multiplexer based on Si nanowires is demonstrated for the first time (to our knowledge). Each waveguide in the array has an individual photonic crystal (PhC) reflector at its end, making the AWG layout design very flexible. An eight-channel AWG (de)multiplexer with a channel spacing of 400 GHz is demonstrated experimentally. The total size of the fabricated AWG is as small as 134mumx115mum. The excess loss of the fabricated reflective AWG (de)multiplexer is about 3-4 dB, and the crosstalk is about -12dB.
