[13p-B415-1~14] 3.3 Information photonics and image engineering

△ [13p-B415-8] Robustness of Optical Unitary Converter based on Multi-Plane Light Conversion

〇(M2)Ryota Tanomura Tanomura¹, Rui Tang¹, Takuo Tanemura¹, Yoshiaki Nakano¹ (1.The Univ. of Tokyo)

Keywords:optical unitary converter, optical neural network, programmable optical device

Optical unitary converter circuits, which enable arbitrary unitary operation in the optical domain, will be the key technology in realizing photonic programmable processors for deep-learning optical neural networks (ONNs), quantum computing, and so on.
In this paper, we study an integrated OUC based on multi-plane light conversion (MPLC) with multiport directional couplers and demonstrate its larger robustness and scalability compared with the conventional Clements scheme. As a unique property of the MPLC scheme, substantial coupling among all the ports is present at every layer, which provides required redundancy at large N without the need for extra phase shifters.