Fig. 5: High-speed performance for signal conversion.
From: Scalable photonic-phonoinc integrated circuitry for reconfigurable signal processing

a Schematic to measure the eye diagram for the signal conversion from RF to optical fields. AWG, arbitrary wave generator; OSC, oscilloscope. b-e Measured eye diagram with input bit rates at 125 kbps, 250 kbps, 500 kbps, and 1 Mbps, respectively.