Non-intrusive polarization dependent loss monitoring in fiber-optic transmission systems

PMD and PDL monitoring of traffic-carrying transatlantic fibre-optic system

“…Another useful system parameter that this coherent monitoring system can provide is the PDL seen by the receiver, which can be found from the output voltage V(t) of either RF detector [6],…”

“…Fig. 3a shows the measured PDL against time using the procedure described in [6], while Fig. 3b provides the statistic distribution of PDL s .…”