采用高阶调制QAM传输估计反谐振空芯光纤中的克尔非线性-葛大伟 Optical Fiber Communication Conference 2023

Nonlinear-Penalty-FreeReal-Time40×800Gb/sDP-64QAM-PCS

TransmissionWithLaunchPowerof28dBmOveraConjoined-

TubeHollow-CoreFiber

DaweiGe1(Presentingauthor)

ShoufeiGao2,MingqingZuo1,YuyangGao3,YingingWang2,DechaoZhang1,WeiDing2,*,HanLi1,*,XiaodongDuan1andZhangyuanChen3

1ChinaMobileResearchInstitute;2JinanUniversity;3PekingUniversity2023.03.08

W4H.7

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目录

Background

Fiberlinkpreparation&transmissionsetup

ExperimentalResults

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Threelimitsforcurrentopticalfibercommunications

Tobreakthroughthephysicallimitationsofopticalfibersintermsofloss,delayandcapacity,novelfibermediumsandtransmissionsystemsarenecessary.

Loss

OSNR=58+Pin-α×L-NF-10×log10(N)

Nofurtherimprovementanymore

Keyperformanceindicator

Delay

WirelessCommunication

VgforAir/Vacuum~3×108m/s

LatencyofMicrowavelinkcanbe2/3ofthelatencyofstraightenedfiberlink

Link

Latency

Originalfiberlink(Red)

14.5ms

SpreadNetworks’straightenedfiberlink(Green)

13.1ms

Micro-waverelaylinkofTradeworxandMcKayBrothers(BlueandOrange)

<10ms

Current

Opticalfiber

communication

VgforSMF

~2×108m/s

Capacity

NonlinearShannonlimitmakesitverydifficulttosurpass200Tb/sinSMFoveralongdistance.

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Gen.1Photonicbandgapfiber

Blochevanescentfield

Light-guiding

in

air

air

photonicbandgap

(DOS=0)

Leakageloss=0Surfacescattering≈0.8dB/km@1.96μm

Lowestloss1.2dB/km@1620nm

Uniform

glass

Low-loss

HCF

air

Travelingwave

F-Pcavityenhance reflection (DOS≠0)

Leakageloss≠0

Otherlos？

Loslimitation0.1dB/km?

Gen.2Anti-resonantHCF

tube

Anti-resonanthollow-corefiber(ARF)isthemostpromisingapproachtoovercomethethreelimitations

Airandvacuumarehigh-qualitynaturalmediaforlighttransmission.Low-losslight-guidinginairamongaflexionalwaveguideshouldbethebestway.

e

index

Leakageloss=0

Raleighscattering≈0.14dB/km

Lowestloss0.142dB/km

Solid-coreFibertotalinternalreflection

evanescentfield

Refractiv

ARFvssolid-coreSMF

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Solid-coreSMF

•Loss：0.142dB/km

•Guidingwindow：1.3m,1.5m

•Nonlinearity：1~10/(W.km)

•Vg：c/1.46

•CD：16.7ps/(nm.km)

•Damagethreshold：KWtoMWpeakpower

•Cheap

ARF

•Loss：0.174dB/km(currentscorebyORC)

•Guidingwindow：Ultrawide4-5times

•Nonlinearity：<5x10-4/(W.km)3-4order

•Vg：c33%cutinlatency

•CD：2ps/(nm.km)

•Damagethreshold：GW

•Highpolarizationmaintaining、lowTCD…

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目录

Background

Fiberlinkpreparation&transmissionsetup

ExperimentalResults

TheARFundertest

HighpowertransmissionexperimentpushingKerrnonlinearitytothelimithasnotbeenreportedyetonlow-lossARF,whichweareaimingtoverify.

Conjoined-tubefiber(CTF)[1]

üLoss：2dB/km@1512nm

üLength：190mwarpedaroundabobbinwithadiameterof15cm

FirstIMI-freedata

transmissionoverHCF[2]

üWereportedthefirstIMI-freedatatransmissionoverHCFbysweepingacrossthecrosssectionoftheCTFtoexcitehigher-ordermodes.

[1]ShoufeiGaoetal.,Nat.Commun.,8:2828,2018.[2]XiaocongWangetal.,Opt.Lett.,44(9),2019.7

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Low-lossinterconnection

Low-lossinterconnectionbetweenCTFandSSMFisalsonecessary,whichwehavereportedinourpreviousOEbyusingTECandanti-reflectioncoating.

Low-lossinterconnectionbetweenCTFandSSMF[3]

MeasuredIL

TECfiberfabrication

[3]ZheZhangetal.,Opt.Express,30(9),2022.

üThermallyexpandedcore(TEC)formodefieldadaption

üFresnelreflectionmitigatedbyanti-reflectioncoating

üIL≈0.3dB

üILcanbepreservedforover10months

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ComparisontestbasedonCTF,G.652.DandG.654.E

l800GDP-64QAM-PCSreal-timeopticalmoduleusedasanonlinearimpactsensor.

lG.652.DandG.654.Efiberatthelengthof200musedascontrolgroup.

Experimentalsetup

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目录

Background

Fiberlinkpreparation&transmissionsetup

ExperimentalResults

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üAllobservedOSNRpenaltiesfortheARFlinkcomefromthe10mlongsingle-modepatchcord.

üIftakingoutthepatchcordinfluence,noOSNRpenaltycanbeseenbyARF.

üIn-bandpoweris2dBlowerthanthetotaloutputpower,sotheactualpowerforin-bandis28dBm.

Results

Single-channelhighpowertest

l800GDP-64QAM-PCSreal-timeopticalmoduleusedasanonlinearimpactsensor.

lG.652.DandG.654.Efiberatthelengthof200musedascontrolgroup.

üFor200mG.652.D,Pin>26dBmwillcauseuncorrectableerror.

üFor200mG.654.E,Pin>27.5dBmwillcauseuncorrectableerror.

üFor190mCTF,evenwith28dBmlaunchpower,theBERonlydeterioratesalittle.

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üSignificantcorrelationbetweentheOSNRpenaltiesandlossspectrumcanbeobserved.

üTheOSNRpenaltiesaresmallenoughtobenegligible.

üForeverychannel,thelaunchpoweris12dBm,whichisfarlargerthantheoptimallaunchpoweronG.652.DorG.654.E.

Fully-loadedC-band40×800Ghigh-powertransmission

lLossspectrumofCTFinC-bandisnotflat,indicatingthattherewillbelargeroverlapbetweenthelightandglasstubeatthewavelengthswithlargerloss.

lLargerov