title: Optical performance monitoring for OFDM using low bandwidth coherent receivers.
abstract: We propose using low bandwidth coherent receivers for distributed optical performance monitoring. We demonstrate optical signal-to-noise ratio (OSNR) monitoring of both 20-Gb/s single-polarization and 40-Gb/s polarization-multiplexed coherent optical orthogonal frequency-division multiplexing (CO-OFDM) signals with a 0.8-GHz receiver using both data-aided (DA) and non-data-aided (NDA) approaches. The sampling rate of the performance monitor is much lower than the signal baud rate, so provides a cost-effective solution for distributed optical performance monitoring. The proposed method is demonstrated experimentally and through simulation. The results show that after calibration the OSNR monitoring error is less than 1 dB and the two approaches are not affected by fiber dispersion after 800-km transmission and 30-ps differential group delay (DGD).
authors.affiliation: Victoria Research Laboratory, NICTA Ltd., Level 2, Building 193, Electrical and Electronic Engineering, University of Melbourne, Australia. siminchen@nicta.com.au
authors.forename: Simin
authors.initials: S
authors.lastname: Chen
authors.forename: Trevor
authors.initials: T
authors.lastname: Anderson
authors.forename: Don
authors.initials: D
authors.lastname: Hewitt
authors.forename: An V
authors.initials: AV
authors.lastname: Tran
authors.forename: Chen
authors.initials: C
authors.lastname: Zhu
authors.forename: Liang B
authors.initials: LB
authors.lastname: Du
authors.forename: Arthur J
authors.initials: AJ
authors.lastname: Lowery
authors.forename: Efstratios
authors.initials: E
authors.lastname: Skafidas
mesh_terms: D003198:Computer Simulation; D017076:Computer-Aided Design; D004867:Equipment Design; D019544:Equipment Failure Analysis; D005336:Fiber Optic Technology / Q000295:instrumentation*; D008027:Light; D008962:Models, Theoretical; D055096:Optical Devices; D012542:Scattering, Radiation; D013685:Telecommunications / Q000295:instrumentation*