I have done a very simple circuit to understand the Y waveguide, in the file call Y waveguide and the figure with the same name, the optical spectra that corresponds to the OSA 1 and the OSA 2 are wider than those corresponding to the optical spectra OSA 3 and OSA4. Is it because for the two firsts the Y waveguide is operating in a bidirectional configuration while in the other is operating as splitter or combiner as appropriate? Is there any feedback when it works in bidirectional configuration?
Thanks a lot in advance,
Y Waveguide.icp (1.8 MB)