Title :
Optimized Silicon AWG With Flattened Spectral Response Using an MMI Aperture
Author :
Pathak, Shibnath ; Vanslembrouck, Michael ; Dumon, Pieter ; Van Thourhout, Dries ; Bogaerts, Wim
Author_Institution :
Dept. of Inf. Technol., Ghent Univ. - IMEC, Ghent, Belgium
Abstract :
We demonstrate compact 12-channel 400 GHz arrayed waveguide grating wavelength demultiplexers (AWG) in silicon with a flattened spectral response. Insertion loss, crosstalk and non-uniformity are -3.29 dB, 17.0 dB and 1.55 dB, respectively. The flattened spectral response is obtained by using an optimized mode shaper consisting of a multi-mode interference coupler as the input aperture of the AWG. The ratio of the 1 dB bandwidth to the 10 dB bandwidth is improved by 50%, from 0.33 to 0.49 compared to a conventional AWG. The device size is only 560×350 μm2 .
Keywords :
arrayed waveguide gratings; elemental semiconductors; light interference; optical couplers; optical crosstalk; silicon; MMI aperture; Si; compact 12-channel arrayed waveguide grating wavelength demultiplexers; crosstalk; flattened spectral response; frequency 400 GHz; insertion loss; multimode interference coupler; nonuniformity; optimized mode shaper; optimized silicon AWG; Apertures; Arrayed waveguide gratings; Arrays; Couplers; Crosstalk; Passband; AWG; MMI; phasar (phased array); silicon-on-insulator (SOI);
Journal_Title :
Lightwave Technology, Journal of
DOI :
10.1109/JLT.2012.2231399
