High contrast all-optical diode based on direction-dependent optical bistability within asymmetric ring cavity

Xia Xiu-Wen^{1, 2, †,}, Zhang Xin-Qin¹, Xu Jing-Ping², Yang Ya-Ping²

Optical bistability in symmetric ring cavity. In panel (a) we take α₀l = 3.75, and R₁ = R₂ = 0.7, 0.8, 0.9, and the bistable state of R₁ = R₂ = 0.9 taken for example, optical bistable regime (I_l, I_u) bounded by two green dotted lines, which separate it from the linear regime (0, I_l) and saturated regime (I_u, ∞). In panel (b) we set R₁ = R₂ = 0.9 and α₀l = 1.25, 2.00, and 3.75.