Fast And Adaptive Chromatic Dispersion Compensation Scheme For Digital Coherent Systems Utilizing Two-Stage Estimation

Abstract

A two-stage fast and adaptive chromatic dispersion (CD) estimation algorithm is proposed and demonstrated for coherent polarization-division-multiplexed (PDM) systems. The first stage uses signal power auto-correlation function for the coarse estimation while the second stage utilizes a modified constant modulus algorithm (MCMA) to obtain much more accurate accumulated CD. Simulation results show that the proposed algorithm is sufficient for CD estimation in non-dispersionmanaged optical transmission of 112-Gb/s PDM-QPSK or 224-Gb/s PDM- 16QAM signals. The concept is further experimentally verified in a 40-Gb/s PDM-QPSK system. Only ∼7% estimation time is required to achieve similar accuracy compared to previous MCMA algorithm.

Publication Date

6-15-2015

Publication Title

Optics Express

Volume

23

Issue

12

Number of Pages

16177-16183

Document Type

Article

Personal Identifier

scopus

DOI Link

https://doi.org/10.1364/OE.23.016177

Socpus ID

84962584588 (Scopus)

Source API URL

https://api.elsevier.com/content/abstract/scopus_id/84962584588

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