WDM protocol-transparent distance extension using R2 remodulation

Green, P.E.; Janniello, F.J.; Ramaswami, Rajiv

doi:10.1109/49.510920

Cited by 27 publications

(7 citation statements)

References 9 publications

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“…The value of 2R signal regeneration (amplification and zero crossing detection) in optoelectronic transponders has recently been pointed out [9]. The number of sequential optoelectronic switching stages permissible on a network route would be increased by including 2R regeneration in the electronics at the matrix output ports.…”

Section: Using Optoelectronic Switches In Wdm Networkmentioning

confidence: 99%

Optoelectronic switching: technology and architecture

MacDonald¹,

Sharma²,

Keyworth³

et al. 1997

SPIE Proceedings

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In optical networks using wavelength routing the ability to assign wavelength channels independently on each link is very useful but to maintain optical transparency then becomes very difficult. In fact optical transparency is not a specific requirement of networks that transmit signals independent of their format. Transponders can provide wavelength conversion if adequate performance can be achieved in the electronic routing of signals independent of format.We demonstrate experimentally a lOxlO matrix switch that is bit-rate, format, and modulation transparent for analogue signals and data at various rates up to 2.5 Gbps. The switch architecture is suitable for use in a wavelength converting transponder node. Prospects for staging these devices at OC-48 and OC-192 rates are discussed."Transparency" is an advantageous feature of optical networks using wavelength division multiplexing (WDM) [1]. Since optical links can in principal carry signals of any modulation format or bit rate, a network in which optical paths are maintained throughout is independent of the signals it carries and therefore is easy to expand and upgrade. WDM provides a routing capability so that connectivity in such a network need not be constrained by the physical layout. However it is difficult to maintain end to end paths on unique wavelengths because foreseeable WDM technology will not provide more than a few tens of wavelength channels for use in the whole network.The limited number of wavelength channels is most effectively used if wavelength assignments can be independently made on each network link. A crossconnect function is then required by which incoming signals at a node can be assigned new wavelength channels on outgoing links. Methods of wavelength 2 SPIE Vol. 2918 • O-8194-2320-31971$lO.OO Downloaded From: http://proceedings.spiedigitallibrary.org/ on 06/27/2016 Terms of Use: http://spiedigitallibrary.org/ss/TermsOfUse.aspx

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Section: Using Optoelectronic Switches In Wdm Networkmentioning

confidence: 99%

Optoelectronic switching: technology and architecture

MacDonald¹,

Sharma²,

Keyworth³

et al. 1997

SPIE Proceedings

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“…One advantage of deploying OTs is that more loss budget can be assigned to the distribution network, and perhaps fewer optical amplifiers may be needed on the feeder ring because the OT performs regeneration with reshaping [29]. Another advantage of OTs is that they may simplify network management and reduce the blocking probability of on-demand wavelength connections between customers on the same ORMA-Net, i.e., customers do not have to communicate via identical wavelengths.…”

Section: B Wavelength Density In the Distribution Networkmentioning

confidence: 99%

Architectural principles of optical regional and metropolitan access networks

Saleh¹,

Simmons²

1999

J. Lightwave Technol.

173

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High-end access networks that serve large businesses and campuses will greatly benefit from the introduction of WDM technology, in terms of greater bandwidth, increased flexibility, and enhanced services. We refer to such networks as optical regional and metropolitan access networks (ORMA-Nets). Here, we qualitatively and quantitatively investigate many important principles, as well as challenges, in deploying ORMA-Nets. Access networks in general are functionally composed of a feeder network, which is responsible for traffic aggregation, and a distribution network, which directly interfaces with the customer premises. We present several configurable, scalable designs for the feeder network that are capable of aggregating a range of traffic types and rates. We also present architectures for achieving a high degree of functionality using relatively lowcost, passive optical components in the distribution network. We explore topics such as optimal switch placement and wavelength banding, and emphasize the technologies that are needed to deliver advanced capabilities. Various underlying themes run throughout the paper, such as optionally not always using bandwidth as efficiently as possible in order to simplify the architecture, and the importance of transparency in providing enhanced services and architectural flexibility.

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“…However, the design of these repeaters must accommodate the fact that matched filters are optimal only for a fixed pulse width. Therefore, it is necessary to employ sub-optimum bit rate transparent filters in the design of mid-span optical repeaters in long distance optical links [6][7][8][9].…”

Section: Introductionmentioning

confidence: 99%

A discrete-time model for binary detection with rectangular hysteresis operators

Korman

2006

Physica B: Condensed Matter

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WDM protocol-transparent distance extension using R2 remodulation

Cited by 27 publications

References 9 publications

Optoelectronic switching: technology and architecture

Optoelectronic switching: technology and architecture

Architectural principles of optical regional and metropolitan access networks

A discrete-time model for binary detection with rectangular hysteresis operators

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