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We demonstrate an optical data wavelength converter based on an electricallydriven photonic molecule structure comprising two coupled active siliconmicroring resonators. The converter, supplied by a continuous-wave (CW)microwave drive signal equal in frequency to the desired wavelength shift,replicates an input optical signal at a new wavelength. The opticalcoupled-cavity system matches supermode resonances to the input andwavelength-converted optical waves maximizing the conversion efficiency. Twodevice designs that perform wavelength up- and down-conversion by 0.19 nm (24GHz) with -13 dB conversion efficiency and 6 GHz bandwidth; and by 0.45 nm (56GHz) with -18 dB efficiency and 5 GHz bandwidth are demonstrated. A 4 Gbpsnon-return-to-zero (NRZ) optical data stream is shifted in wavelength andsuccessfully recovered. This architecture accepts CMOS-level RF drive voltagesand can be integrated in monolithic CMOS electronic-photonic platforms with asimple signal source circuit as part of a self-contained subsystem on chip thatgenerates and carries out the wavelength conversion, requiring nohigh-frequency (optical or electrical) and high-power external pump input tothe chip. This type of device may become a new standard element in thecomponent libraries of silicon and CMOS photonics processes.

Active-cavity photonic molecule optical data wavelength converter for silicon photonics platforms