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[RACTI-RU1-2004-53] Pleros, N. , Bintjas, C , Kanellos, T , Vlachos, Kyriakos , Avramopoulos, Hercules and Guekos, G. , Recipe for Intensity Modulation Reduction in SOA-Based Interferometric Switches [DOI]
Keywords: All-optical signal processing, intensity modulation, interferometric switches, nonlinear transfer function, optical packet switching, optical regeneration, semiconductor optical amplifier (SOA), wavelength conversion
[RACTI-RU1-2011-59] Yiannopoulos, K. , Spiropoulou, Maria , Sygletos, Stelios , Varvarigos, Emmanouel and Tomkos, Ioannis , Optical buffering up to 160 Gb/s employing a quantum dot semiconductor optical amplifier-based architecture
Abstract: wavelength conversion with regenerative capabilities, for all optical packet switched networks. The architecture consists of cascaded programmable delay stages that minimise the number of wavelength converters required to implement the buffer. Physical layer simulations have been performed in order to reveal the potential of this scheme as well as the operating and device parameters of QD-SOA-based wavelength converters. The results obtained have indicated that, up to three time-slot interchanger (TSI) cascaded stages show good performance at 160 Gb/s in the 1550 nm communication window.[RACTI-RU1-2009-61] Vlachos, Kyriakos , Rafaelli, Carla , Aleksic, Slavisa , Andriolli, Nicola , Apostolopoulos, Dimitrios , Avramopoulos, Hercules , Erasme, Didier , Klonidis, Dimitris , Petersen, Martin Nordal , Scaffardi, Mirco , Schulze, Karsten , Spiropoulou, Maria , Sygletos, Stelios , Tomkos, Ioannis , Vazquez, Carmen , Zouraraki, Olga and Neri, Fabio , Photonics in switching: enabling echnologies and subsystem design
Abstract: wavelength (circuit)switched,whereopticalcross-connects(OXCs)areusedto
switchtraffic[1].However,opticalcircuitswitching(OCS)perfectlyfitsforsmooth
trafficofconstantbitrates,butisunsuitablefordynamicalopticalnetworkingtosup-
portburstytraffic.Opticalpacketswitching(OPS)[2]hasbeenproposedforthe
on-demanduseofcapacity.Althoughverypromising,thistechnologylagsbehinddue
tothelackofatrueopticalrandomaccessmemory.Thisstressestheneedforon-the-
flypacketprocessing,whichisimpossiblewiththecurrentstate-of-the-artall-optical
logic[3].Anotherpromisingcandidateisopticalburstswitching(OBS),whichcom-
binesthemeritsofpacketandcircuitswitching[4].OBShasbeenproposedtorelax
thetechnologyconstraintsofOPSbyattainingthedynamic,fastsetupofvirtual
lightpaths.Inanycase,itisonlytheswitchingspeedthatreallytransformstheraw
bitratesintousefulbandwidth,andphotonictechnologyplaysanimportantrole
towardthisaim.Tosupportdynamicopticalnetworking,opticalrouterswithfast
reconfigurationcapabilityarerequired.Inrecentyearsmanyresearchactivitieshave
beeninvestigatingarchitecturalsolutionsforopticalrouterimplementation[5-7].A
keypointistheavailabilityoffeasibleenablingphotonictechnologytomeetarchitec-
turalandoperationalrequirements.
Thispaperreviewsthestateoftheartofphotonictechnologyforhigh-performance
opticalswitchingandreportsrecentresearchresultsfromtheVirtualDepartmenton
OpticalSwitchingandSystems(VD-S),partofthee-Photon/ONe+andICT-BONE
networkofexcellence[8,9].Togetherwithanotherpapermainlyrelatedtosystem
aspectsandexperimentsinphotonicswitching[10],itprovidesaquitecompleteover-
viewofthecurrentresearchactivitiesinthatfieldtoofferacommonknowledgeplat-
formtostimulatefurtherresearch.Thee-Photon/ONe+networkofexcellenceisan
EU-fundedprojectthataimsatintegratinganddevelopingknowledgeinthefieldof
opticalnetworkingandphotonictechnology.TheVD-Sworkinggroupconsistsof22
academicandindustrialpartners,anditsscopeistoidentifyanddevelopkeyswitch-
ingtechnologiestomakethespectrumefficientintermsofswitchingandnotonlyin
termsofcapacity.Towardthisgoal,theVD-Sworkinggroupdevelopedsynergies
betweenpartnersthroughcollaborativeprojects,includingmobilityactionsforinte-
gratingresearchersandforobtainingaccesstouniqueexperimentalfacilitiesand
opticaltestbeds.
WithinthecourseoftheVD-Sgroup,keyopticalsubsystemsthathavebeenidenti-
fiedtoexhibitsignificantperformanceadvancesoverothercandidatetechnologiesare
opticalbuffers,opticalmultiplexers/demultiplexers,andopticalpacket/burstswitches.
However,toachievetheadvantagesofhighperformanceandlowpowerconsumption
thatphotonicscanoffer,otherbuildingblockssuchaswavelength converters,optical
logicgates,andregeneratorsmustbedeveloped.Thispaperreviewstheenabling
technology,presentstherecentadvancesinthedesignanddevelopmentofsuchsub-
systems,andpresentsrecenteffortstowardtheimplementationofatrueall-optical
packetswitchingnode.
Therestofthepaperisorganizedasfollows.Section 2 presentsenablingoptical
technologiesandisparticularlyfocusedonrecentadvancesinhybridintegration,
wavelength conversion ,andringresonator scapabilities.Sections 3-5 presentthe
stateoftheartintheseareasandresearchresultscarriedoutandundertheorgani-
zationofVD-S.FinallySection 6 concludesthepaper.
