Reducing the backreflection impact by using homodyne detection in WDM single-fiber loopback access networks

Abstract

This paper uses homodyne detection to reduce the impact of backreflections in wavelength division multiplexing (WDM) single-fiber loopback access networks. We present the principle of our beat noise suppression scheme and the configuration of upstream signal transmission that enhances the effectiveness of the proposed technique. We also experimentally confirm that beat noises can be eliminated within the signal bandwidth with no significant waveform distortion.