超过 400Gbps 通道速率传输.pdf

1、Beyond 400Gbps Lane Rate TransmissionArbitrary Waveform Generator(256Gs,80GHz)Electrical Signal GenerationElectrical Signal Detection30 cm RF cables 15 cm RF cables Real-time Oscilloscope(256Gs,113GHz brick-Wall)Broadband Balun LP filter CDR FFE equalizer Error counting Channel de-embedding AWGOptic

2、al Signal GenerationOptical Signal DetectionBalunTFLN modulator(1.2V V,100GHZ 10dB BW)Optical Sampling Oscilloscope(120GHz BW smooth roll-off)1310nm laser LP filter Ref.Equalizer (CTLE+FFE+DFE)OMA,TDECQ(PAM4)15 cm RF cables 15 cm RF cables 220GBd PAM4(440Gb/s)2e-3 BER Mian limitation:BW176GBd PAM6(4

3、40Gb/s)2e-6 BERMain limitation:SNR150GBd PAM8(450Gb/s)2e-5 BERMain limitation:SNR-5-3-11357911131504080120Power dBmFrequency GHz200GBd PAM4(400Gb/s)170GBd PAM6(425Gb/s)150GBd PAM8(450Gb/s)Enabling 448G Pathfinding with todays T&M equipment Extended generator bandwidth required for PAM4 PAM4 limited by ISI(AWG BW)and SNR(low ER)CTLE+FFE+DFE CTLE+FFE PAM6 limited by SNR PAM8 limited by SNRCTLE+FFE