设计了一种基于四阶脉冲幅度调制(PAM4)技术的50 Gbit/s 40 km QSFP28封装的长距离光传输模块,以应对现代社会对通信传输的带宽、速率和容量等要求的不断增长。使用了PAM4技术以提高单波长的数据传输容量,使得单波传输速率达到50 Gbit/s...设计了一种基于四阶脉冲幅度调制(PAM4)技术的50 Gbit/s 40 km QSFP28封装的长距离光传输模块,以应对现代社会对通信传输的带宽、速率和容量等要求的不断增长。使用了PAM4技术以提高单波长的数据传输容量,使得单波传输速率达到50 Gbit/s;在模块的接收单元使用雪崩光电二极管(APD)作为光探测器,使得模块对小光信号的接收能力得到提高;测试结果表明,模块的性能较为稳定,优化了APD部分电路设计,以获得更佳的传输效果,能够满足50 GE 40 km传输。展开更多
This paper aimed to propose two algorithms,DA-M and RF-M,of reducing the impact of multipath interference(MPI)on intensity modulation direct detection(IM-DD)systems,particularly for four-level pulse amplitude modulati...This paper aimed to propose two algorithms,DA-M and RF-M,of reducing the impact of multipath interference(MPI)on intensity modulation direct detection(IM-DD)systems,particularly for four-level pulse amplitude modulation(PAM4)systems.DA-M reduced the fluctuation by averaging the signal in blocks,RF-M estimated MPI by subtracting the decision value of the corresponding block from the mean value of a signal block,and then generated interference-reduced samples by subtracting the interference signal from the product of the corresponding MPI estimate and then weighting factor.This paper firstly proposed to separate the signal before decision-making into multiple blocks,which significantly reduced the complexity of DA-M and RF-M.Simulation results showed that the MPI noise of 28 GBaud IMDD system under the linewidths of 1e5 Hz,1e6 Hz and 10e6 Hz can be effectively alleviated.展开更多
针对强度调制和直接检测(IM-DD)短距光传输系统中,由于光器件带宽受限特性,导致接收端检测到的PAM4信号存在较大符号间干扰(inter symbol interference,ISI),给出了一种基于判决反馈均衡器(DFE)级联超奈奎斯特速率(FTN)传输的带宽受限...针对强度调制和直接检测(IM-DD)短距光传输系统中,由于光器件带宽受限特性,导致接收端检测到的PAM4信号存在较大符号间干扰(inter symbol interference,ISI),给出了一种基于判决反馈均衡器(DFE)级联超奈奎斯特速率(FTN)传输的带宽受限下的补偿方案,并在不同的带宽受限场景下进行了仿真验证。仿真结果表明,该带宽受限补偿方案能够有效地恢复接收到的PAM4信号,在误码率低于10-3时,有1 d B左右的性能收益。展开更多
The 4-level pulse amplitude modulation(PAM4)based on an 23 GHz ultrabroadband directly modulated laser(DML)was proposed.We have experimentally demonstrated that based on intensity modulation and direct detection(IMDD)...The 4-level pulse amplitude modulation(PAM4)based on an 23 GHz ultrabroadband directly modulated laser(DML)was proposed.We have experimentally demonstrated that based on intensity modulation and direct detection(IMDD)56 Gbps per wavelength PAM4 signals transferred over 35 km standard single mode fiber(SSMF)without any optical amplification and we have achieved the bit error rate(BER)of the PAM4 transmission was under 2.9×10–4 by using feed forward equalization(FFE).展开更多
文摘设计了一种基于四阶脉冲幅度调制(PAM4)技术的50 Gbit/s 40 km QSFP28封装的长距离光传输模块,以应对现代社会对通信传输的带宽、速率和容量等要求的不断增长。使用了PAM4技术以提高单波长的数据传输容量,使得单波传输速率达到50 Gbit/s;在模块的接收单元使用雪崩光电二极管(APD)作为光探测器,使得模块对小光信号的接收能力得到提高;测试结果表明,模块的性能较为稳定,优化了APD部分电路设计,以获得更佳的传输效果,能够满足50 GE 40 km传输。
基金supported by the National Key Research and Development Program of China 2021YFB2900801the Young Elite Scientists Sponsorship Program of CIC 2021QNRC001+1 种基金National Natural Science Foundation of China NSFC,62201033,U22A2005the Foundation of the Beijing Engineering and Technology Center for Convergence Networks and Ubiquitous Services.
文摘This paper aimed to propose two algorithms,DA-M and RF-M,of reducing the impact of multipath interference(MPI)on intensity modulation direct detection(IM-DD)systems,particularly for four-level pulse amplitude modulation(PAM4)systems.DA-M reduced the fluctuation by averaging the signal in blocks,RF-M estimated MPI by subtracting the decision value of the corresponding block from the mean value of a signal block,and then generated interference-reduced samples by subtracting the interference signal from the product of the corresponding MPI estimate and then weighting factor.This paper firstly proposed to separate the signal before decision-making into multiple blocks,which significantly reduced the complexity of DA-M and RF-M.Simulation results showed that the MPI noise of 28 GBaud IMDD system under the linewidths of 1e5 Hz,1e6 Hz and 10e6 Hz can be effectively alleviated.
文摘针对强度调制和直接检测(IM-DD)短距光传输系统中,由于光器件带宽受限特性,导致接收端检测到的PAM4信号存在较大符号间干扰(inter symbol interference,ISI),给出了一种基于判决反馈均衡器(DFE)级联超奈奎斯特速率(FTN)传输的带宽受限下的补偿方案,并在不同的带宽受限场景下进行了仿真验证。仿真结果表明,该带宽受限补偿方案能够有效地恢复接收到的PAM4信号,在误码率低于10-3时,有1 d B左右的性能收益。
基金supported by National Key Research and Development Program of China (No. 2018YFB2201101)the National Natural Science Foundation of China (Nos. 61635001 and 61575186)
文摘The 4-level pulse amplitude modulation(PAM4)based on an 23 GHz ultrabroadband directly modulated laser(DML)was proposed.We have experimentally demonstrated that based on intensity modulation and direct detection(IMDD)56 Gbps per wavelength PAM4 signals transferred over 35 km standard single mode fiber(SSMF)without any optical amplification and we have achieved the bit error rate(BER)of the PAM4 transmission was under 2.9×10–4 by using feed forward equalization(FFE).
