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Capacity Improvement of TWDM-PONs Exploiting the 16-QAM Technique for Downstream Side With a Nonlinearity Effect Study for Upstream DML

Bindhaiq, Salem and Zulkifli, Nadiatulhuda and Supa'at, Abu Sahmah M. and Shaddad, Redhwan Q. (2015) Capacity Improvement of TWDM-PONs Exploiting the 16-QAM Technique for Downstream Side With a Nonlinearity Effect Study for Upstream DML. Journal Of Optical Communications And Networking, 7 (10). pp. 1018-1024. ISSN 1941-7012

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Official URL: http://dx.doi.org/10.1364/JOCN.7.001018

Abstract

Currently, the main goal of developing time-wavelength-division multiplexing passive optical networks (TWDM-PONs) is to acquire capacity improvement in a scalable and cost-effective manner. In response to the challenge, this paper demonstrates a full-system TWDM-PON through physical layer simulation that provides 56 Gb/s downstream and 40 Gb/s upstream bandwidths. We propose a simple and cost-effective scheme to improve the capacity of the downstream signal by utilizing highly spectrally efficient 16 quadrature amplitude modulation (QAM) with 20 GHz radio-over-fiber signal distribution using a single sideband signal that is generated by an optical dual-arm modulator. In addition, we study the effect of nonlinearity on a directly modulated laser (DML) as the upstream laser of an optical network unit. The outcomes obtained revealed good transmission quality in both directions, where bit error ratios of 10-6 and 10-5 are obtained for the downstream and upstream transmissions, respectively. This leads to the ability to support up to 128 users over 40 km of single-mode fiber.

Item Type:Article
Uncontrolled Keywords:16 QAM, DML, PON2, ROF, TWDM-PON
Subjects:A General Works
ID Code:57994
Deposited By: Haliza Zainal
Deposited On:04 Dec 2016 12:07
Last Modified:08 Mar 2017 15:28

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