Open AccessOptical performance monitoring for OFDM using low bandwidth coherent receivers
Author(s) -
Simin Chen,
Trevor Anderson,
Don Hewitt,
An Vu Tran,
Chen Zhu,
Liang Du,
Arthur J. Lowery,
Efstratios Skafidas
Publication year - 2012
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.20.028724
Subject(s) - baud , polarization mode dispersion , differential group delay , optics , polarization division multiplexing , optical performance monitoring , orthogonal frequency division multiplexing , multiplexing , computer science , bandwidth (computing) , optical communications repeater , electronic engineering , optical communication , transmission (telecommunications) , physics , optical fiber , wavelength division multiplexing , telecommunications , engineering , channel (broadcasting) , wavelength
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).