h channel-by-channel tunable optical dispersion compensator using combination of arrayed-waveguide and bulk gratings, Conference on Fiber Communication (OFC), Collocated National Fiber Optic Engineers Conference, 2010 (OFC/NFOEC), San Diego, CA, IEEE/OSA, s.l., pp. 1-3, 2010. 6. Yang, K., Liu, J., Zeng, X., Electronic dispersion compensation for PMD in 40-GB/s optical links, Communications and Photonics Conference and Exhibition (ACP), Shanghai, China, IEEE, s.l., pp. 1-2, 2009. Telecommunication Networks 7. Sunnerud, H., Karlsson, M., Andrekson, P. A., Analytical theory for PMD-compensation, IEEE Photonics Technology Letters, 12(1), 50-52 (2000). 8. Lid, X., Xie, C., van Wijngaarden, A. J., Multichannel PMD mitigation through forward-error correction with distributed fast PMD scrambling, Optical Fiber Communication Conference (OFC 2004), Los Angeles, CA, IEEE, s.l., Vol. 1, pp. WE2 1-3, 2004. Liu, X., All-channel PMD mitigation using distributed fast polarization scrambling in WDM sys- tems with FEC, Conference on Optical Fiber Communication and the National Fiber Optic Engineers Conference, 2007, OFC/NFOEC 2007, Anaheim, CA, IEEE/OSA, s.l., pp. ONH4 1-3, 2007. 10. Klekamp, A., Werner, D., Bülow, H., Study of different 40Gbit/s FECs regarding PMD mitiga- tion efficiency by fast polarization scrambling, Conference on Optical Fiber Communication and National Fiber Optic Engineers Conference, 2008, OFC/NFOEC 2008, San Diego, CA, IEEE/OSA, s.l., p. JWA54, 2008. 11. Bulow, H., Limitation of optical first-order PMD compensation, Optical Fiber Communication Conference, 1999, and the International Conference on Integrated Optics and Optical Fiber Communication, OFC/IOOC '99, San Diego, CA, Technical Digest, IEEE/OSA, s.l., Vol. 2, pp. 74-76, 1999. 12. Midrio, M., First-order PMD compensation in nonlinearly dispersive optical communication systems via transmission over the principal states of polarization, IEEE Journal of Lightwave Technology, 17(2), 2512-2515 (1999). 13. Linares, L. C. B., von der Weid, J. P., Compariso