  This paper demonstrates the operation of a universal RF photonic circuit that
consists of a generalized Mach Zehnder Interferometer architecture with its Nx1
combiner replaced by a NxN optical DFT network. The proposed circuit
architecture can be used for SSB modulation, frequency
up-conversion/down-conversion, frequency multiplication and phase correlated
subcarrier generation based on the choice of output ports and dimension (N) of
the circuit. An alternative representation of the circuit is also reported with
the aim of a systematic demultiplexing. A transfer matrix approach is used to
develop the theoretical predictions which are verified by simulation using
industry standard software tool. An integrated circuit based on silicon
photonics technology readily available in the laboratory is used for
experimental confirmation.
