Component for second-order compensation of polarisation-mode dispersion

Polarization mode dispersion impairments and mitigation in fiber optic transmission lines

“…On the other hand, 3 DOF could in principle be used for the first PC in figs 4 (d-e), but we found in the simulations that the third DOF in the first PC made little difference. The 2-3 DOF methods in figs 4 (a,c) can be analyzed analytically [43], (e) 5 DOF postcomp [44], (f) polarizer method (4 DOF) [45] (for 2DOF polarizer method see [41]). …”

The inverse PMD problem

“…A discussion of two-section emulators with general conical sweep can be found in [19], while the mathematical PMD inversion of the planar sweep is described in [13] and [17]. We should note that the planar sweep model does not emulate PCD as we have prescribed that ∆τω = 0.…”

Novel MSE adaptive control of optical PMD compensators

“…In the technical literature, several solutions, ranging from first- [1]- [3] to higher-order compensators exploiting planar lightwave circuits (PLCs) [4], [5] or cascaded polarization controllers (PCs) coupled with polarization-maintaining fibers (PMFs) or delay lines [6]- [9], have been proposed. The adaptive adjustment of the compensator parameters is often based on criteria aimed at the reconstruction of the undistorted transmitted waveform, by using either the degree of polarization, the orientation of the PMD vector, or the electrical spectrum of the signal at the photodetector output [1]- [3], [6]- [11]. The complexity of the resulting compensator driver can be high due to the needed error signals.…”