Can we use Flexible Transponders to Reduce Margins?

Augé, Jean-Luc

doi:10.1364/ofc.2013.otu2a.1

Cited by 56 publications

(45 citation statements)

References 1 publication

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“…However that situation has changed with the advent of flexible networking, and it will be possible in the future to match the transmission and spectrum resources to the available OSNR of the route [15].…”

Section: A Power Budgets and Marginsmentioning

confidence: 99%

Core Networks in the Flexgrid Era

Lord

Wright

Mitra

2015

J. Lightwave Technol.

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Section: A Power Budgets and Marginsmentioning

confidence: 99%

Core Networks in the Flexgrid Era

Lord

Wright

Mitra

2015

J. Lightwave Technol.

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“…This capability is required in order to explore levels of optimal adaptability considering an available link's resources (spectrum, power, OSNR, and so on) and flexible service requirements (data rate, power consumption, spectral efficiency, reach, and so on) [21]. In this context, different approaches of flexible transponders have been recently proposed.…”

Section: B Flexible Transpondersmentioning

confidence: 99%

Toward Terabit Autonomic Optical Networks Based on a Software Defined Adaptive/Cognitive Approach [Invited]

Oliveira¹,

Oliveira²,

Magalhães³

et al. 2015

J. Opt. Commun. Netw.

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Terabit elastic optical networking (EON) is foreseen as a viable solution to extend the lifetime of a network exploiting the available bandwidth in previously deployed optical fibers. EON is based on bandwidth-variable transponders capable of supporting multiple bit rates and/ or modulation formats according to traffic requirements and node architectures that route arbitrary channel bandwidths. Thus, EON increases the heterogeneity of the network, which may create the need for autonomic adaptive and/or cognitive techniques. In this context, the software-defined networking (SDN) paradigm emerges as an opportunity to enable such techniques thanks to the centralized view of the network by decoupling the control plane and the data plane. This paper surveys different activities carried out at the Optical Technologies Division in Centro de Pesquisa e Desenvolvimento em Telecomunicações, Brazil. We review an optical transport SDN controller for virtual optical networks that supports two adaptive algorithms. First, the autonomic flexible transponder reconfigures the transmission modulation format according to a threshold level. Second, the adaptive global spectrum equalization reconfigures the wavelengths' attenuation profiles applied at the optical nodes to improve the signals' optical signal-to-noise ratio (OSNR) at reception. Finally, we report experimental results of an in-band OSNR monitor for advanced modulation formats.

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“…It is clear that the achievable distances for various configurations are not sufficient to bridge majority of the links in a medium to long-haul network infrastructure. Also, it is worth mentioning that typically super-channels would be operating at higher forward error correction (FEC) thresholds (soft-decision FEC); however we evaluate the maximum reach at BER of 1e-3, and assume that the additional FEC margin will be utilized for system margin allocation [26]. In order to improve the maximum attainable distance, we employed INLC, as shown in Fig.…”

Section: Reach Analysismentioning

confidence: 99%

Intra super-channel fiber nonlinearity compensation in flex-grid optical networks

Rafique¹,

Rahman²,

Napoli³

et al. 2013

Opt. Express

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Abstract:We report on the nonlinear transmission limits of various superchannel configurations in a flex-grid network upgrade scenario. In particular, we consider flexible data-rates ranging from 180Gb/s to 1.2Tb/s, employing either single-carrier, dual-carrier, or penta-carrier polarization multiplexed m-state quadrature amplitude modulation (PM-8QAM/PM-16QAM) -termed as super-channels, and establish transmission performance margins for each configuration, both with and without superchannel fiber nonlinearity compensation. Our results show that the benefit of intra super-channel nonlinearity mitigation (nonlinear compensation addressing full super-channel bandwidth) reduces with increasing subcarrier count within the super-channel, and that single-carrier super-channel achieves the maximum improvement from nonlinearity mitigation (up to ~4.5dB, in Q-factor), better than dual-carrier (up to ~3.5dB) and pentacarrier (up to ~2dB) configurations. Moreover, the maximum reach improvement, compared to linear compensation only, is found to be ~170%

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Can we use Flexible Transponders to Reduce Margins?

Cited by 56 publications

References 1 publication

Core Networks in the Flexgrid Era

Core Networks in the Flexgrid Era

Toward Terabit Autonomic Optical Networks Based on a Software Defined Adaptive/Cognitive Approach [Invited]

Intra super-channel fiber nonlinearity compensation in flex-grid optical networks

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