High contrast all-optical diode based on direction-dependent optical bistability within asymmetric ring cavity
Xia Xiu-Wen1, 2, †, 
, Zhang Xin-Qin1, Xu Jing-Ping2, Yang Ya-Ping2
, Zhang Xin-Qin1, Xu Jing-Ping2, Yang Ya-Ping2 Block diagram of an all-optical AND gate.
