[D-8-2] Loss Measurement of Multiple Layer a-Si Waveguides toward 3D Si-Optical Circuits J. H. Kang1、K. Inoue1、Y. Atsumi1、N. Nishiyama1、S. Arai1 (1.Tokyo Tech , Japan) https://doi.org/10.7567/SSDM.2010.D-8-2