THE DYNAMICS OF STATE OF POLARIZATION IN PRESENCE OF CONVENTIONAL POLARIZATION EFFECTS IN OPTICAL FIBERS

The presence of polarization mode dispersion (PMD) vector in an optical fiber leads to rotate the input state of polarization (SOP) vector with an angle determined by both the value of PMD vector and the frequency. Also, the PMD leads to differential group delay (DGD) between the polarization components. The presence of polarization dependent loss (PDL) vector leads to attenuate one of the components and increases the other by a magnitude determined by the value of PDL vector. The study of each phenomenon individually does not give a proper description to the physical nature of the optical fiber system, because these two phenomenons arise together in the same time. In this paper, a new theoretical model is introduced to determine the output SOP as a function of PMD, PDL, and input SOP. On the other hand, a new expression was formulated to the dynamical equation and proved that the principal states of polarization (PSP) vector is a complex, where real and imaginary parts of PSP vector represent the PMD and PDL vectors, respectively. Using these vectors, a new values of DGD and PDL may by found.