Fig. 4: Reconfigurable signal conversion between RF and optical fields mediated by acoustic fields.
From: Scalable photonic-phonoinc integrated circuitry for reconfigurable signal processing

a Schematic of the measurement setup. AWG, arbitrary wave generator; SA, spectrum analyzer; PD, photodiode; DAQ, data acquisition card. b Arbitrarily reconfigurable mapping between RF frequencies (Ω1, Ω2, Ω3) and optical wavelengths (λ1, λ2, λ3) with extinction ratio over 30 dB. c, d Two specific mapping diagrams from RF frequencies to optical wavelengths. e, f Measured data stream after signal conversion from RF frequencies to optical wavelengths with the mapping diagram in (c, d), respectively. Input bits (0 and 1) are labeled for reference.