Abstract
A bandwidth-efficient coherent analog IFoF approach is proposed, employing a twin optical sideband (twin-OSSB) modulation of intermediate frequency-over-fiber (IFoF) signals in a dually modulated electroabsorption modulated laser (EML), demonstrating stable modulations without complex bias drifts and polarization control. The receiver (Rx) utilizes heterodyne detection with phase noise canceling (PNC) techniques for channel recovery. Successful demonstrations include an 8 Gbps aggregated twin-OSSB of two QPSK channels, with measurements covering optical back-to-back (btb) and 25 km of a standard single-mode fiber (SSMF), revealing sensitivities of -30 dBm and -25 dBm for QPSK-twin-OSSB and 16-QAM single user, respectively.
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