224Gbit/s偏振复用16正交幅度调制传输中脉冲整形与数字反向传播的比较
Pulse-shaping versus digital backpropagation in 224Gbit/s PDM-16QAM transmission.
作者信息
Behrens Carsten, Makovejs Sergejs, Killey Robert I, Savory Seb J, Chen Ming, Bayvel Polina
机构信息
Department of Electronic and Electrical Engineering, University College London (UCL), London, UK.
出版信息
Opt Express. 2011 Jul 4;19(14):12879-84. doi: 10.1364/OE.19.012879.
We investigate the transmission performance of 224Gbit/s polarization-division-multiplexed 16-state quadrature amplitude modulation (PDM-16QAM) for systems employing standard single mode fiber (SSMF) and erbium doped fiber amplifiers (EDFAs). We consider the effectiveness of return-to-zero (RZ) data pulses with varying duty cycles and digital backpropagation (DBP) in reducing nonlinear distortion in wavelength-division- multiplexed (WDM) links with 3, 5, 7 and 9 channels. Similar improvement in transmission reach of 18-25% was achieved either by pulse-carving at the transmitter or by DBP, yielding maximum transmission distances of up to 1760km for RZ-pulse-shapes and 1280km for NRZ.
我们研究了采用标准单模光纤（SSMF）和掺铒光纤放大器（EDFA）的系统中224Gbit/s偏振复用16状态正交幅度调制（PDM-16QAM）的传输性能。我们考虑了具有不同占空比的归零（RZ）数据脉冲和数字反向传播（DBP）在减少具有3、5、7和9个信道的波分复用（WDM）链路中的非线性失真方面的有效性。通过在发射端进行脉冲整形或采用DBP，传输距离有类似18 - 25%的提升，对于RZ脉冲形状，最大传输距离可达1760km，对于非归零（NRZ）脉冲形状则为1280km。
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