Study of PMD and PDL equalization via a nonunitary FIR lattice filter

Gadi Garfinkel*, Avishay Eyal

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review


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.

Original languageEnglish
Pages (from-to)542-544
Number of pages3
JournalIEEE Photonics Technology Letters
Issue number8
StatePublished - 15 Apr 2008


FundersFunder number
Israel Science Foundation


    • Optical equalization
    • Polarization-dependent loss (PDL)
    • Polarization-mode dispersion (PMD)
    • Spectral factorization


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