Methods for Low Crosstalk and Wavelength Tunability in Arrayed-Waveguide Grating for On-Silicon Optical Network 

 S. Tondini,   C. Castellan,   M. Mancinelli,   C. Kopp,   L. Pavesi

Journal of Lightwave Technology (Volume: 35, Issue: 23, Dec.1, 1 2017); 

DOI: 10.1109/JLT.2017.2768161

Link