Fig. 2: Comparison of the SFI versus the MFI.
From: Highly efficient photonic convolver via lossless mode-division fan-in
a, b Scanning electron microscope (SEM) images of the SFI and the MFI structures. c Measured insertion losses of SFI and MFI. d Optical microscope image of MFI cascaded with a multimode photodetector. e Responsivities for the SFI and MFI.
