Optically implemented synchronized low frequency sampling methodology for filtering and recovery of noise embedded narrow band signals

Design and simulation of a novel photonic low-cost, uncomplicated and cheap tunable sub-millimeter wave receiving system for communication applications are presented. The receiver, capable of operating at 280-300 GHz band is based on low frequency sampling and filtering of narrow band signals embedded with strong white noise in submillimeter spectra using two synchronized low frequency trains (∼500 MHz) in order to down-convert and recover the high frequency THz signal under 10dB SNR. The system consists of standard optical devices (lenses, Joint-Transform Correlator and Kerr effect crystal). Before sampling, the received signal (including noise) should be time inverse using time inversion module and accumulated with itself. Using Joint-Transform Correlator, the time manipulated sampling is being correlated and Fourier transformed as a result the 280-300 GHz narrow-band signals can be identified and reconstructed.