Abstract
Recirculating loops have long been used as experimental models for installed systems. They provide a relatively inexpensive way to observe accumulated signal impairments such as noise, dispersion, and nonlinear effects. However, very few studies have been done describing the polarization effects within the loop. Both polarization dependent loss (PDL)1,2 and polarization mode dispersion (PMD)3 are known to cause signifi-cant transmission impairments. In addition to their separate influence on transmission performance the combination of PDL and PMD also must be taken into account to fully explain their impact on system performance. In the study presented here we will show detailed measurements and simulations of the Q distributions in a recirculating loop and show that periodic nature of the loop can profoundly affect the measurement, and hence bit-error rate, in the system.
© 2002 Optical Society of America
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