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Opt Express. 2010 Dec 20;18(26):26929-36. doi: 10.1364/OE.18.026929.

Multi-impairment monitoring from adaptive finite-impulse-response filters in a digital coherent receiver.

Author information

1
University of Tokyo, Department of Electrical Engineering and Information Systems, Tokyo, Japan. faruk@ginjo.t.u-tokyo.ac.jp

Abstract

We propose a novel and unified algorithm that estimates linear impairments in optical transmission systems from tap coefficients of an adaptive finite-impulse response (FIR) filter in a coherent optical receiver. Measurable impairments include chromatic dispersion (CD), differential group delay (DGD) between two principal states of polarization, second-order polarization-mode dispersion (second-order PMD), and polarization-dependent loss (PDL). We validate our multi-impairment monitoring algorithm by dual-polarization quadrature phase-shift keying (QPSK) transmission experiments.

PMID:
21196969
[Indexed for MEDLINE]
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