Figure 4
From: Integrated multi-port circulators for unidirectional optical information transport
Experimental measurements. (a) Normalized output power from port 2 (green) and port 4 (red) as a function of the injected current in the SOA following port 1, where the signal is launched. The three insets show near-field intensity profiles from the output port 2, at different current levels. The isolation ratio is maximum at 200 mA. (b) Wavelength dependence of the isolation offered by this 4-port re-routing device. The system operates in a broadband manner in the wavelength range of 1545–1565 nm.
