Mode crosstalk evaluation on optical mode switch

Abstract

We show the mode crosstalk between the fundamental mode and the 1st order mode based on the optical mode switch to investigate the performance experimentally for the first time. In order to evaluate the mode crosstalk, we fabricated and integrated multimode interference (MMI) mode filter with the optical mode switch. The crosstalk of approximately -10 dB between modes has been evaluated by using this mode filter.