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1、Nonlinear-Penalty-Free Real-Time 40800Gb/s DP-64QAM-PCS Transmission With Launch Power of 28 dBm Over a Conjoined-Tube Hollow-Core Fiber Dawei Ge1(Presenting author)Shoufei Gao2,Mingqing Zuo1,Yuyang Gao3,Yinging Wang2,Dechao Zhang1,Wei Ding2,*,Han Li1,*,Xiaodong Duan1 and Zhangyuan Chen31 China Mobi

2、le Research Institute;2 Jinan University;3 Peking University2023.03.081W4H.72目录Background1Fiber link preparation&transmission setup2Experimental Results3Three limits for current optical fiber communicationsTo breakthrough the physical limitations of optical fibers in terms of loss,delay and capacity

3、,novel fiber mediums and transmission systems are necessary.Loss3Nonlinear Shannon limit makes it very difficult to surpass 200Tb/s in SMF over a long distance.DelayCapacityOSNR=58+Pin-L-NF-10log10(N)Key performanceindicatorNo further improvement anymoreCurrentOptical fiber communicationVg for SMF21

4、08m/sWirelessCommunicationVg for Air/Vacuum3108m/sLatency of Microwave link can be 2/3 of the latency of straightened fiber linkLinkLatencyOriginal fiber link(Red)14.5 msSpread Networks straightened fiber link(Green)13.1 msMicro-wave relay link of Tradeworx and McKay Brothers(Blue and Orange)10 msAn

5、ti-resonant hollow-core fiber(ARF)is the most promising approach to overcome the three limitationsAir and vacuum are high-quality natural media for light transmission.Low-loss light-guiding in air among a flexional waveguide should be the best way.4photonic band gap（DOS=0）Gen.1Photonic bandgap fiber

6、Leakage loss=0Surface scattering 0.8 dB/km1.96mLowest loss 1.2dB/km1620nmairF-P cavity enhance reflection（DOS 0）Gen.2Anti-resonant HCFLeakage loss 0Loss limitation0.1dB/km?airUniformglass tubeOther loss？Bloch evanescent fieldTraveling waveLow-lossHCFSolid-core Fibertotal internal