Polarization dependent loss emulator built with computer-driven polarization controllers and single mode fibre

In this paper, a polarization dependent loss emulator is designed with computer-driven polarization controllers and single mode fibre. It proves that PDL obeys Maxwellian distribution when it is expressed in decibels. By positioning the polarization controllers at different places in the emulator link, it also proves that positions of PDL components have a significant effect on the statistics of PDL in a fixed length communication system. As the number of polarization components involved and the communication fibre length remain as constants, the longer the uninterrupted fibre is, the smaller the PDL mean value is produced.