Polarization sensitivity of 40 Gb/s transmission over short-reach 62.5 /spl mu/m multimode fiber using single-mode transceivers

System performance of 40 Gb/s transmission over short-reach, commercial-grade 62.5 /spl mu/m multimode fiber using readily available single-mode transceivers is highly sensitive to launch polarization. Return-to-zero transmission experienced 3-dB power penalty, while nonreturn-to-zero suffered link outage.