title: Multi-impairment monitoring from adaptive finite-impulse-response filters in a digital coherent receiver.
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.
authors.affiliation: University of Tokyo, Department of Electrical Engineering and Information Systems, Tokyo, Japan. faruk@ginjo.t.u-tokyo.ac.jp
authors.forename: Md Saifuddin
authors.initials: MS
authors.lastname: Faruk
authors.forename: Yojiro
authors.initials: Y
authors.lastname: Mori
authors.forename: Chao
authors.initials: C
authors.lastname: Zhang
authors.forename: Koji
authors.initials: K
authors.lastname: Igarashi
authors.forename: Kazuro
authors.initials: K
authors.lastname: Kikuchi
mesh_terms: D017076:Computer-Aided Design; D004867:Equipment Design; D019544:Equipment Failure Analysis; D005374:Filtration / Q000295:instrumentation*; D055096:Optical Devices; D012815:Signal Processing, Computer-Assisted / Q000295:instrumentation*; D013685:Telecommunications / Q000295:instrumentation*