All-optical diode in a periodically-poled Lithium Niobate waveguide

K. Gallo, G. Assanto, K. R. Parameswaran, and M. M. Fejer

Appl. Phys. Lett. 79, 314-316 (2001)


Based on Quasi-Phase-Matching engineering of a LiNbO3 channel waveguide, we have demonstrated a guided-wave all-optical diode operating at 1.55 Ám. For input peak powers beyond 1.5W the device exhibited a spatially non-reciprocal response, lending to optical isolation with contrasts as high as 90% at 3.1W, in agreement with theoretical predictions.