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FireFly™OpticalHalfCables
ApplicationNote
Revision2:Feb2018
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COPYRIGHTS,TRADEMARKSANDPATENTS
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Patents
Patents:8588562and8588561.AdditionalPatentspending.
UpdatedDocumentation
Please contact [email protected] to get access to the latest PCIe® documentation including theOpticalCableAssemblyUserManual,aswellasthePCIe®OverFiberGuide,andtoensurethatyouhavethelatestversionofthisdocument.
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TableofContents
1 FIREFLY™OPTICALCABLES....................................................................................................................52 MPOCONNECTORS...............................................................................................................................83 MPOBULKHEADADAPTERSASOPTICALPANELADAPTERS.................................................................94 FIBEROPTICPATCHCABLES................................................................................................................105 HALFCABLEBACK-TO-BACKOPERATIONWITHOUTPATCHCABLES..................................................136 ECUO–T12TOECUO–R12..................................................................................................................137 ECUO–T12TOFOPCTOECUO–R12...................................................................................................158 ECUO–Y12TOECUO–Y12..................................................................................................................189 ECUO–Y12TOFOPCTOECUO–Y12...................................................................................................2010 ECUO–B04TOECUO–B04.................................................................................................................2211 ECUO-B04TOFOPCTOECUO-B04......................................................................................................2412 ECUO-B04TOMIMICAQSFP+PLUGGABLEMODULE........................................................................2613 ECUO-B04TOFOPCTOQSFP+PLUGGABLEMODULE........................................................................2714 REFERENCES........................................................................................................................................29
ListofFigures
Table1.FireFlyHalfOpticalCableConfigurations.......................................................................................6
Figure1.FireFlyHalfOpticalCable(-T12,-R12or-B04)..............................................................................6
Figure2.FireFly“Y”HalfOpticalCable(-Y12)..............................................................................................7
Figure3.12ChannelMaleMPOConnector.................................................................................................8
Figure4.MPOAdapters,Opposed(Left)andAligned(Right)......................................................................9
Figure5.12FiberOpticalPatchCableSignalMap.....................................................................................11
Figure6.24FiberOpticalPatchCableSignalMap.....................................................................................12
Figure7.ECUO-T12toECUO-R12SignalMap............................................................................................14
Figure8.ECUO-T12toFOPCtoECUO-R12SignalMap..............................................................................16
Figure9.ECUO-T12toFOPCtoECUO-R12SignalMap..............................................................................17
Figure10.ECUO-Y12toECUO-Y12SignalMap..........................................................................................19
Figure11.ECUO-Y12toFOPCtoECUO-Y12SignalMap............................................................................21
Figure12.ECUO-B04toECUO-B04SignalMap..........................................................................................23
Figure13.ECUO-B04toFOPCtoECUO-B04SignalMap............................................................................25
Figure14.ECUO-B04toMimicaQSFP+PluggableModule.......................................................................26
Figure15.ECUO-B04toFOPCtoQSFP+PluggableModule.......................................................................28
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ChangeHistory
Revision# Reason Author Date
01 InitialDraft RogerMiller 1/4/2016
02 CorrectionstoSec11 R.Miller 2/19/2018
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1 FireFly™OpticalCablesSamtecmanufacturesFireFlyactiveoptical cables (AOCs)whichprovideamid-boardmountedopticalinterconnectsolutionforchip-to-chip,board-to-boardorsystem-to-systemapplications,atdataratesupto 28 Gbps and link distances up to 100 m. FireFly optical modules are currently available in twoconfigurations.The first configuration consistsofa separate transmitter (TX)and receiver (RX)opticalmodule, each having 12 unidirectional (half duplex) optical channels. Together, the TX and RX cablesform a 12 channel (x12) full duplex optical link. The second configuration is a 4 channel (x4) opticaltransceiver,whichcontains4bidirectional(fullduplex)opticallinksinasinglemodule.
The active and opto-electronic circuitry in the FireFly opticalmodule is packaged on a printed circuitboard(PCB)substrate,whichisintegratedtogetherwithanopticalblockandheatsink.Theribbonfiberispermanentlyattachedthroughtheopticalblocktotheopticalengine.TheFireFlymoduleplugs intotheuserhostPCBviaatwopartconnectorsystem,whichisolatesthehighspeedelectricalsignalsfromthelowspeedcontrolandDCpower.
FireFlyopticalcablesareavailableintwoversions:AfullAOC,oraHalfOpticalCable(HOC).AfullAOChas FireFly opticalmodules on both ends of the cable, connected togetherwith a 12 channel ribbonfiber. This type of cable is used for chip-to-chip flyover applications on a host PCB. The cables areavailableinvariousfiberlengths.
Inboard-to-boardorsystem-to-systemapplications,itisusuallynecessarytoroutethefiberinterconnectthroughachassisbulkhead,orpre-installedstructuredcabling.Inthiscase,apairofHalfOpticalCables(HOC)istypicallyused,togetherwithafiberopticpatchcable(FOPC),andbulkheadOpticalPanelAdapters(OPA).ThisapplicationnotedealsspecificallywithHOCs,andhowtheyshouldbeconnectedtogether.
TheFireFlyHOCconsistsofanopticalmoduleanditsribbonfiberpigtail.TheribbonfiberisnormallyterminatedonthefarendwithanMPOstylemulti-channelopticalconnector.MPOconnectorsareavailablein12or24opticalchannels,andcanbeconfiguredasmaleorfemale.OnecommonbrandofMPOconnectoristheMTP™,madebyUSConec.Othertypesofopticalconnectorscanbeinstalleduponrequest.However,MPOisbyfarthemostcommonlyused.
TheMPOendoftheHOCispluggedintoabulkheadmountedOPA.ThesameisdonewiththeHOCattheremoteequipment.AlongFOPCisusuallyusedtoconnectbetweenthetwosystems.
ThebasepartnumberforaFireFlycableisECUO-xxx.Thelast3charactersofthebasepartnumberdefinethecableconfiguration.Table1listsallthepossiblehalfcableconfigurations.
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HalfOpticalCableBasePartNumber
Description
ECUO-T12 AX12TXUnidirectionalopticalmoduleterminatedina12fiberMPOconnector.12halfduplexopticalTXchannelsaresupported.
ECUO-R12 AX12RXUnidirectionalopticalmoduleterminatedina12fiberMPOconnector.12halfduplexopticalRXchannelsaresupported.
ECUO-B04 Ax4Bidirectionalopticalmoduleterminatedina12fiberMPOconnector.4fullduplexopticalchannelsaresupported.
ECUO-Y12 Ax12TXmoduleandax12RXmodulejoinedina“Y”configuration,andterminatedtoasingle24fiberMPOconnector.12fullduplexopticalchannelsaresupported.
Table1.FireFlyHalfOpticalCableConfigurations
Figure1showsapictureofaFireFlyhalfopticalcable,whichisrepresentativeofanECUO-T12,ECUO-R12orECUO-B04cable.Figure2showsaFireFlyECUO-Y12halfopticalcable.
Figure1.FireFlyHalfOpticalCable(-T12,-R12or-B04)
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Figure2.FireFly“Y”HalfOpticalCable(-Y12)
Aswillbedescribedindetailinthefollowingsections,theMPObulkheadadaptersandtheFOPCsareavailableindifferentconfigurations,whichaffecthowtheopticalsignalsaremappedontotheconnectors.Furthermore,SamtecusesaspecificsignalmapbetweenthefiberribboncableoftheHOCandtheMPOconnector.Becauseofthis,itisnecessarytousetheproperMPOadapterandFOPCconfiguration.Otherwise,end-to-endconnectivitymaynotbeachievedbetweentheHostandRemoteTransmit(Tx)andReceive(Rx)opticalchannels.ThepurposeofthisapplicationnoteistodefinetheproperconfigurationstobeusedwithSamtecHOCs,basedontheintendedapplication.
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2 MPOConnectorsMPO connectors arewidely used in parallel optical applications. TheMPO connector provides a highdensity optical connectivity solution, together with a mechanical mechanism to provide positivelatching. TheMPO connectors used in Samtec half optical cables are configured in either 12 or 24opticalchannels.ApairofMPOconnectorscanbematedthroughabulkheadmountedMPOadapter,whichoccupiesverylittlespaceontheequipmentpanel.
Figure3showsa12channelmaleMPOconnector.TheMPOconnectorconsistsofaMTferrule,MPOhousing,andalatchingmechanism.ThemaleMTferrulecontainsthe12opticalchannelsandtheguidepins.AfemaleMTferrulehasholesthataccepttheguidepinsfromthemaleMTferrule.The12opticalchannelsarearranged ina single rowon theMT ferrule. Ina24channelMPOconnector, theopticalchannelsarearrangedin2rowsof12channelseach.
TheferruleisinstalledintotheMPOhousing.TheMPOhousinghasaguidekey,whichensuresthattheopticalchannelnumbersareorientedproperlywith respect to theMPOadapter.TheMPOhousing isenclosed by a spring loaded latchingmechanism.When twoMPO cables aremated through aMPObulkhead adapter, the spring loaded latching mechanism keeps the two MT ferrules firmly seatedagainsteachother.ItisimportantthatthetwoMTferrulesarefirmlyseatedagainsteachotherinordertoeliminateanyairgap,whichminimizestheopticalattenuationthroughthematedconnectorpair.
Figure3.12ChannelMaleMPOConnector
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3 MPOBulkheadAdaptersasOpticalPanelAdaptersTheMPObulkheadopticalpaneladapters(OPA)areavailablein2differentconfigurations,definedbytherelativeorientationoftheconnectorkeysoneachendoftheadapter:
• Opposed• Aligned
Opposedadaptershavetheconnectorkeysonoppositesidesoftheadapter(thekeysareopposingeachother).TheresultisthattheMPOconnectorswhichplugintotheadapterwillberotated180degreesinrelationtoeachother.Alignedadaptershavetheconnectorkeysonthesamesideoftheadapter(keysalignedwitheachother).Theresultisthattheconnectorswillbealignedinrelationtoeachother.SamteccansupplytheMPOadapters,ortheycanbepurchasedfromothervendors.TheMPOadapterswillworkwitheither12or24channelMPOconnectors.Figure4showsthetwotypesofMPObulkheadadapters.
Figure4.MPOAdapters,Opposed(Left)andAligned(Right)
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4 FiberOpticPatchCablesInaHalf-Cableapplication,aFiberOpticPatchCable (FOPC) is typicallyused toconnectbetween thehost and target PCIe® equipment, at theMPObulkhead adapters. The FOPCs are available in variouslengths.SamteccansupplytheFOPCs,ortheycanbepurchasedfromvarioussuppliers.LiketheMPOconnectors,theyareavailablewith12or24opticalchannels.
Patch cables are commonly available in 2 different styles, depending on how the optical fibers aremappedonto theFOPCMPOconnector. Themap scheme is referred toas thepolarityof theopticalsignals.
Figure5showstheopticalsignalmapfor12channelgenericpatchcables,ofTypeAandTypeB.ATypeA cablemaps pin 1 on one end of the cable to pin 1 on the other end, and pin 2 to pin 2, etc. It issometimesreferredtoasa“straightthrough”cable.ATypeBcableflipsthechannelsbetweenends.Inotherwords,pin1ofoneendconnectstopin12ontheotherend,pin2topin11,etc.Itissometimesreferred to as an “inverted” cable. Samtec only supplies the Type B FOPC, but it is important tounderstandthedifferencesbetweenthetwocabletypes.
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Figure5.12FiberOpticalPatchCableSignalMap
TYPE Aside a 12 fiber (a) side b
mpo position
fiber color
mpo position
1 blue 1
2 orange 2
3 green 3
4 brown 4
5 slate 5
6 white 6
7 red 7
8 black 8
9 yellow 9
10 violet 10
11 rose 11
12 aqua 12
TYPE Bside a 12 fiber (b) side b
mpo position
fiber color
mpo position
1 blue 12
2 orange 11
3 green 10
4 brown 9
5 slate 8
6 white 7
7 red 6
8 black 5
9 yellow 4
10 violet 3
11 rose 2
12 aqua 1
12-Fiber Connector
Position 1
Key
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A24fiberFOPCisrequiredforthe–Y12“Ycable”configuration.The24fiberFOPCpatchcableisavailablefromSamtecwithTypeCpolarityonly.
Figure6showstheopticalsignalmapfora24fiberFOPC.Position1ononeendofthecableconnectstoposition13ontheotherend,position2connectstoposition14,etc.Thechannelsareroutedtotheoppositerowonthefarendconnector,whilemaintainingpositionwithinthesamecolumn.
Figure6.24FiberOpticalPatchCableSignalMap
TYPE Cside a 24 fiber (c) side b
mpo position
fiber color
mpo position
1 blue 13
2 orange 14
3 green 15
4 brown 16
5 slate 17
6 white 18
7 red 19
8 black 20
9 yellow 21
10 violet 22
11 rose 23
12 aqua 24
13 blue (+) 1
14 orange (+) 2
15 green (+) 3
16 brown (+) 4
17 slate (+) 5
18 white (+) 6
19 red (+) 7
20 black (+) 8
21 yellow (+) 9
22 violet (+) 10
23 rose (+) 11
24 aqua (+) 12
24-Fiber Connector
Key
Position 1
Position 13
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5 HalfCableBack-to-BackOperationwithoutPatchCablesInsomeinstances, itmaybedesirabletooperatetwoFireFlyHOCs inaback-to-backconfiguration. Inthis application, the MPO ends of the two cables are simply connected together, through an MPOadapter,withoutusingapatchcable.
Typicalapplicationsare:aquickloopbacktest,ortoevaluatehalfcableconnectivityovervariouslengthsorwithmultiplehost/targetcombinations.
CaremustbetakentousetheproperpolarityMPOadapter,aswillbedescribed laterforeachoftheFireFlyhalfcables.
6 ECUO–T12toECUO–R12This section describes the back-to-back configuration for two ECUO 12 channel unidirectional cables,onecablebeinga12channelTX(ECUO-T12)andtheotherbeinga12channelRX(ECUO-R12).
Figure7showsthesignalmapforback-to-backoperationoftwoHOCs.Bothofthesehalf-cablesusea12channelMPOconnector.NotethatanopposedMPOadapterisrequired.Followingthesignalflow,Tx1ontheleft-handcableconnectstoRx1ontheright-handcable,andsoon,withallTxchannelsononecablebeingconnectedtothecorrespondingRxchannelontheothercable,andviceversa.
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Figure7.ECUO-T12toECUO-R12SignalMap
Opposed MPO Adapter OPA-S-1-FECUO-T12
ECUO-R12
12-Rx11
1-Rx01-Tx0
12-Tx11
ECUO-T12 signal map
function fiber color
mpo position
Tx0 blue 1
Tx1 orange 2
Tx2 green 3
Tx3 brown 4
Tx4 slate 5
Tx5 white 6
Tx6 red 7
Tx7 black 8
Tx8 yellow 9
Tx9 violet 10
Tx10 rose 11
Tx11 aqua 12
ECUO-R12 signal map
function fiber color
mpo position
Rx0 blue 1
Rx1 orange 2
Rx2 green 3
Rx3 brown 4
Rx4 slate 5
Rx5 white 6
Rx6 red 7
Rx7 black 8
Rx8 yellow 9
Rx9 violet 10
Rx10 rose 11
Rx11 aqua 12
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7 ECUO–T12toFOPCtoECUO–R12This section describes the configuration where an ECUO-T12 half cable and an ECUO-R12 half cableare joined using a 12 fiber FOPC. These half cables each have a 12 fiberMPO connector. One cablecontains a 12 channel Tx (-T12) and the other contains a 12 channel Rx (-R12). As was mentionedearlier,thisisacommonapplicationwhentheoptical linkmustbepassedthroughabulkheadateachcableend.
Figure8showsthesignalmapforthisconfigurationwhenaFOPCisused.NotethatonealignedandoneopposedMPOadapterarerequired.Tracingthesignalflowthroughthediagram,itisseenthatalltheTxchannelsononecableconnectwiththecorrespondingRxchannelontheothercable,andviceversa.
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Figure8.ECUO-T12toFOPCtoECUO-R12SignalMap
112
12-Tx111-Tx0
Aligned MPO Adapter OPA-S-2-F
Type B (inverted) FOPC-02-02-XXX-12-01
Opposed MPO Adapter OPA-S-1-F
ECUO-T12
ECUO-R12
121
1-Rx0
12-Rx11
FOPCside a 12 fiber (b) side b
mpo position
fiber color
mpo position
1 blue 12
2 orange 11
3 green 10
4 brown 9
5 slate 8
6 white 7
7 red 6
8 black 5
9 yellow 4
10 violet 3
11 rose 2
12 aqua 1
ECUO-T12 signal map
function fiber color
mpo position
Tx0 blue 1
Tx1 orange 2
Tx2 green 3
Tx3 brown 4
Tx4 slate 5
Tx5 white 6
Tx6 red 7
Tx7 black 8
Tx8 yellow 9
Tx9 violet 10
Tx10 rose 11
Tx11 aqua 12
ECUO-R12 signal map
function fiber color
mpo position
Rx0 blue 1
Rx1 orange 2
Rx2 green 3
Rx3 brown 4
Rx4 slate 5
Rx5 white 6
Rx6 red 7
Rx7 black 8
Rx8 yellow 9
Rx9 violet 10
Rx10 rose 11
Rx11 aqua 12
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ItispossibletoachievethesameconnectivitywhenaTypeA(straightthrough)patchcableisused.Thisrequires theuseof twoopposedtypeMPOadapters.Figure9showsthedetailsof thisconfiguration.NotethatthisconfigurationwillalsoworkwithtwoalignedMPOadapters.
Figure9.ECUO-T12toFOPCtoECUO-R12SignalMap
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12-Tx111-Tx0
Opposed MPO Adapter OPA-S-1-F
Opposed MPO AdapterOPA-S-1-F
ECUO-T12
ECUO-R12
112
1-Rx0
12-Rx11
ECUO-T12 signal map
function fiber color
mpo position
Tx0 blue 1
Tx1 orange 2
Tx2 green 3
Tx3 brown 4
Tx4 slate 5
Tx5 white 6
Tx6 red 7
Tx7 black 8
Tx8 yellow 9
Tx9 violet 10
Tx10 rose 11
Tx11 aqua 12
ECUO-R12 signal map
function fiber color
mpo position
Rx0 blue 1
Rx1 orange 2
Rx2 green 3
Rx3 brown 4
Rx4 slate 5
Rx5 white 6
Rx6 red 7
Rx7 black 8
Rx8 yellow 9
Rx9 violet 10
Rx10 rose 11
Rx11 aqua 12
TYPE Aside a 12 fiber (a) side b
mpo position
fiber color
mpo position
1 blue 1
2 orange 2
3 green 3
4 brown 4
5 slate 5
6 white 6
7 red 7
8 black 8
9 yellow 9
10 violet 10
11 rose 11
12 aqua 12
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8 ECUO–Y12toECUO–Y12This section describes the back-to-back configuration for two ECUO –Y12 HOCs. Each –Y12 cablecontainsa12channelTxanda12channelRxjoinedtogetherina“Y”cable,andterminatedina24fiberMPOconnector.
Figure10shows thesignalmap forback-to-backoperationof these twoHOCs.Note thatanopposedMPO adapter is required. Following the signal flow, Tx on the left-hand cable connects to Rx on theright-handcable,andsoon,withallTxchannelsononecablebeingconnectedtothecorrespondingRxchannelontheothercable,andviceversa.
Opposed MPO AdapterOPA-S-1-F
1- Rx0
ECUO-Y12
ECUO-Y12
24-Tx1113-Tx0
13-Tx024-Tx11
1-Rx012-Rx11
12-Rx11
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Figure10.ECUO-Y12toECUO-Y12SignalMap
ECUO-Y12 signal map
function fiber color
mpo position
Rx0 blue 1
Rx1 orange 2
Rx2 green 3
Rx3 brown 4
Rx4 slate 5
Rx5 white 6
Rx6 red 7
Rx7 black 8
Rx8 yellow 9
Rx9 violet 10
Rx10 rose 11
Rx11 aqua 12
Tx0 blue (+) 13
Tx1 orange (+) 14
Tx2 green (+) 15
Tx3 brown (+) 16
Tx4 slate (+) 17
Tx5 white (+) 18
Tx6 red (+) 19
Tx7 black (+) 20
Tx8 yellow (+) 21
Tx9 violet (+) 22
Tx10 rose (+) 23
Tx11 aqua (+) 24
RxTx
ECUO-Y12 signal map
function fiber color
mpo position
Rx0 blue (+) 1
Rx1 orange (+) 2
Rx2 green (+) 3
Rx3 brown (+) 4
Rx4 slate (+) 5
Rx5 white (+) 6
Rx6 red (+) 7
Rx7 black (+) 8
Rx8 yellow (+) 9
Rx9 violet (+) 10
Rx10 rose (+) 11
Rx11 aqua (+) 12
Tx0 blue 13
Tx1 orange 14
Tx2 green 15
Tx3 brown 16
Tx4 slate 17
Tx5 white 18
Tx6 red 19
Tx7 black 20
Tx8 yellow 21
Tx9 violet 22
Tx10 rose 23
Tx11 aqua 24
RxTx
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9 ECUO–Y12toFOPCtoECUO–Y12ThissectiondescribestheconfigurationwhentwoECUO–Y12half-cablesarejoinedusingaFOPC.Thesehalfcablesuse24fiberMPOconnectors.Aswasmentionedearlier,thisisacommonapplicationwhentheopticallinkmustbepassedthroughabulkheadateachcableend.
Figure11showsthesignalmapforthisconfiguration.NotethattwoalignedMPOadaptersareused.A24fiberFOPCisrequired.Tracingthesignalflowthroughthediagram,itisseenthatalltheTxchannelsononecableconnectwiththecorrespondingRxchannelontheothercable,andviceversa.PleasenotethatthisconfigurationwillalsoworkwithtwoopposedMPOadapters.
Opposed MPO AdapterOPA-S-1-F
FOPC-02-02-XXX-24-01
24-Tx11
12-Rx111-
Rx0
13-Tx0
121
2413
Opposed MPO AdapterOPA-S-1-F
1-Rx0
24-Tx11
12-Rx11
13-Tx0
ECUO-Y12 (24-Channel, Key Down)
121
2413
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Figure11.ECUO-Y12toFOPCtoECUO-Y12SignalMap
ECUO-Y12 signal map
function fiber color
mpo position
Rx0 blue 1
Rx1 orange 2
Rx2 green 3
Rx3 brown 4
Rx4 slate 5
Rx5 white 6
Rx6 red 7
Rx7 black 8
Rx8 yellow 9
Rx9 violet 10
Rx10 rose 11
Rx11 aqua 12
Tx0 blue (+) 13
Tx1 orange (+) 14
Tx2 green (+) 15
Tx3 brown (+) 16
Tx4 slate (+) 17
Tx5 white (+) 18
Tx6 red (+) 19
Tx7 black (+) 20
Tx8 yellow (+) 21
Tx9 violet (+) 22
Tx10 rose (+) 23
Tx11 aqua (+) 24
RxTx
ECUO-Y12 signal map
function fiber color
mpo position
Rx0 blue (+) 1
Rx1 orange (+) 2
Rx2 green (+) 3
Rx3 brown (+) 4
Rx4 slate (+) 5
Rx5 white (+) 6
Rx6 red (+) 7
Rx7 black (+) 8
Rx8 yellow (+) 9
Rx9 violet (+) 10
Rx10 rose (+) 11
Rx11 aqua (+) 12
Tx0 blue 13
Tx1 orange 14
Tx2 green 15
Tx3 brown 16
Tx4 slate 17
Tx5 white 18
Tx6 red 19
Tx7 black 20
Tx8 yellow 21
Tx9 violet 22
Tx10 rose 23
Tx11 aqua 24
RxTx
FOPCside a 24 fiber (c) side b
mpo position
fiber color
mpo position
1 blue 13
2 orange 14
3 green 15
4 brown 16
5 slate 17
6 white 18
7 red 19
8 black 20
9 yellow 21
10 violet 22
11 rose 23
12 aqua 24
13 blue (+) 1
14 orange (+) 2
15 green (+) 3
16 brown (+) 4
17 slate (+) 5
18 white (+) 6
19 red (+) 7
20 black (+) 8
21 yellow (+) 9
22 violet (+) 10
23 rose (+) 11
24 aqua (+) 12
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10 ECUO–B04toECUO–B04Thissectiondescribestheback-to-backconfigurationfortwoECUO–B044channelbidirectionalcables.Recallthateach–B04cableconsistsofa4channelfull-duplexopticalmodule,terminatedina12fiberMPOconnector.
Figure12showsthesignalmapforback-to-backoperationofthetwoHOCs.NotethatanalignedMPOadapter is required. Following the signal flow, Tx1 on the left-hand cable connects to Rx1 on theright-handcable,andsoon,withall4TxchannelsononecablebeingconnectedtothecorrespondingRxchannelontheothercable,andviceversa.Notethatonly8outof12channelsontheribbonfiberareused.
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Figure12.ECUO-B04toECUO-B04SignalMap
Aligned MPO Adapter OPA-S-2-F
ECUO-BO4
1-Rx0
12-Tx01-Rx0
12-Tx0
ECUO-BO4
ECUO-B04 signal map
function fiber color
mpo position
Rx0 blue 1
Rx1 orange 2
Rx2 green 3
Rx3 brown 4
Dark slate 5
Dark white 6
Dark red 7
Dark black 8
Tx3 yellow 9
Tx2 violet 10
Tx1 rose 11
Tx0 aqua 12
ECUO-B04 signal map
function fiber color
mpo position
Rx0 blue 1
Rx1 orange 2
Rx2 green 3
Rx3 brown 4
Dark slate 5
Dark white 6
Dark red 7
Dark black 8
Tx3 yellow 9
Tx2 violet 10
Tx1 rose 11
Tx0 aqua 12
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11 ECUO-B04toFOPCtoECUO-B04ThissectiondescribestheconfigurationwhentwoECUO–B04half-cablesarejoinedusingaFOPC.Thesehalf cables use 12 channelMPO connectors. Aswasmentioned earlier, this is a common applicationwhentheopticallinkmustbepassedthroughabulkheadateachcableend.
Figure13showsthesignalmapforthisconfiguration.NotethattwoopposedMPOadaptersareused.ATypeBFOPCisrequired.Tracingthesignalflowthroughthediagram,itisseenthatalltheTxchannelsononecableconnectwiththecorrespondingRxchannelontheothercable,andviceversa.PleasenotethatthisconfigurationwillalsoworkwithtwoalignedMPOadapters.
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Figure13.ECUO-B04toFOPCtoECUO-B04SignalMap
121
12-Tx01-Rx0
Opposed MPO AdapterOPA-S-1-F
FOPC-02-02-XXX-12-01
Opposed MPO AdapterOPA-S-1-F
ECUO-BO4
ECUO-BO4
12 1
1-Rx0
12-Tx0
FOPCside a 12 fiber (b) side b
mpo position
fiber color
mpo position
1 blue 12
2 orange 11
3 green 10
4 brown 9
5 slate 8
6 white 7
7 red 6
8 black 5
9 yellow 4
10 violet 3
11 rose 2
12 aqua 1
ECUO-B04 signal map
function fiber color
mpo position
Rx0 blue 1
Rx1 orange 2
Rx2 green 3
Rx3 brown 4
Dark slate 5
Dark white 6
Dark red 7
Dark black 8
Tx3 yellow 9
Tx2 violet 10
Tx1 rose 11
Tx0 aqua 12
ECUO-B04 signal map
function fiber color
mpo position
Rx0 blue 1
Rx1 orange 2
Rx2 green 3
Rx3 brown 4
Dark slate 5
Dark white 6
Dark red 7
Dark black 8
Tx3 yellow 9
Tx2 violet 10
Tx1 rose 11
Tx0 aqua 12
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12 ECUO-B04toMimicaQSFP+PluggableModuleQuad Small Form Factor Pluggable (QSFP+) optical modules provide four duplex channels at up to14Gbpsperchannel.TheQSFP+moduleplugsintoapanelmountedcage,whichcontainsaconnectorthatinterfacestothehostPCB.CertainapplicationsmayrequiretheFireFlyECUO-B04moduletomimicaQuadSmallFormFactor(QSFP+)opticalmoduleatthepanel.Forexample,theFireFly–B04moduleneedstoconnecttoaremotesystemcontainingaQSFP+module.ConnectingtheFireFlyB04moduletoanopposedMPOadapterwillmimicaQSFP+module.Figure14showsthesignalmap.
Figure14.ECUO-B04toMimicaQSFP+PluggableModule
ECUO-B04
1-Rx0
12-Tx0
Opposed MPO AdapterOPA-S-1-F
ECUO-B04 with 12-Channel MPO+
Opposed MPO Adapter
Fiber Number: 12 11 10 9 ... 4 3 2 1
Transmit Channels: 0 1 2 3 Receive Channels: 3 2 1 0
ECUO-B04 signal map
function fiber color
mpo position
Rx0 blue 1
Rx1 orange 2
Rx2 green 3
Rx3 brown 4
Dark slate 5
Dark white 6
Dark red 7
Dark black 8
Tx3 yellow 9
Tx2 violet 10
Tx1 rose 11
Tx0 aqua 12
27
13 ECUO-B04toFOPCtoQSFP+PluggableModuleTheQSFP+moduleisdescribedinSection12.CertainapplicationsmayrequirethattheFireFlyB04modulebeconnectedtoaremoteQSFP+module,throughaFOPC.Figure15showsthesignalmapforthisconfiguration.
28
a¸
Figure15.ECUO-B04toFOPCtoQSFP+PluggableModule
ECUO-B04
1-Rx0
12-Tx0
Opposed MPO Adapter OPA-S-1-F
Fiber Number: 12 11 10 9 ... 4 3 2 1
Transmit Channels: 0 1 2 3Receive Channels: 3 2 1 0
FOPC-02-02-XXX-12-01
121
ECUO-B04 signal map
function fiber color
mpo position
Rx0 blue 1
Rx1 orange 2
Rx2 green 3
Rx3 brown 4
Dark slate 5
Dark white 6
Dark red 7
Dark black 8
Tx3 yellow 9
Tx2 violet 10
Tx1 rose 11
Tx0 aqua 12
FOPCside a 12 fiber (b) side b
mpo position
fiber color
mpo position
1 blue 12
2 orange 11
3 green 10
4 brown 9
5 slate 8
6 white 7
7 red 6
8 black 5
9 yellow 4
10 violet 3
11 rose 2
12 aqua 1
29
14 References[1]https://www.samtec.com/optics/optical-cable/mid-board
[2]Samtec:FireFly™Optical14Gx12DataSheet
[3]Samtec:FireFly™Optical14Gx4DataSheet
[4]PCIExpress®ExternalCablingSpecification,Revision2.0
30
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