Study of PMD and PDL Equalization Via a Nonunitary FIR Lattice Filter

• Published in: IEEE photonics technology letters Vol. 20; no. 8; pp. 542 - 544
• Main Authors: Garfinkel, G., Eyal, A.
• Format: Journal Article
• Language: English
• Published: New York IEEE 15.04.2008; The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
• Subjects: Algorithms; Degrees of freedom; Equalization; Finite impulse response filter; Lattices; Mathematical analysis; Optical equalization; Optical fiber communication; Optical filters; Optical lattices; Optical losses; Optical noise; Optical polarization; Page description languages; Polarization mode dispersion; polarization-dependent loss (PDL); polarization-mode dispersion (PMD); Signal to noise ratio; spectral factorization
• ISSN: 1041-1135; 1941-0174
• DOI: 10.1109/LPT.2008.918891

We study a novel configuration and synthesis algorithm for equalization of polarization-mode dispersion (PMD) alone and combined with polarization-dependent loss (PDL) using a nonunitary optical lattice filter (NU-OLF). The NU-OLF is a generalization of a previously studied unitary lattice filter (U-OLF) for PMD equalization. Comparison of the improvement in the noise loaded PMD/PDL-induced eye closure, for typical optical signal-to-noise ratio values, shows that a NU-OLF is always superior to a U-OLF of the same order and it offers a significant advantage over a U-OLF with the same number of degrees of freedom in the equalization of PMD in the presence of PDL.