A Coherent Receiver for Analog-over-Fiber Systems Based on Feed-Forward Carrier-Recovery

In this paper, we introduce a Coherent Receiver for Analog-over-Fiber systems. It features a feed-forward phase-recovery scheme: without any digital phase estimation and without employing phase-locked-loops, the system allows RF signals detection with free-running and large linewidth local oscillator lasers. The receiver is presented, and its performance are investigated by means of numerical simulations.