Integrated Reconfigurable 4×4 Optical Unitary Converter Using Multiport Directional Couplers
Ryota Tanomura, Rui Tang, Samir Kumar Ghosh, Takuo Tanemura, Yoshiaki Nakano · 2019
We demonstrate novel silicon photonic 4×4 reconfigurable optical unitary converter, comprising multiport directional couplers and phase shifter arrays. By optimizing the phase shift with simulated annealing algorithm, reconfigurable mode sorting and switching are experimentally realized.