Transmission of 100-Gb/s VSB DFT-Spread DMT Signal in Short-Reach Optical Communication Systems
Transmission of 100-Gb/s VSB DFT-Spread DMT Signal in Short-Reach Optical Communication Systems
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DOI：
10.1109/jphot.2015.2486684
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发表时间：
2015-10
影响因子：
2.4
通讯作者：
Fan Li;Xinying Li;Junwen Zhang;Jianjun Yu
中科院分区：
文献类型：
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作者：
Fan Li;Xinying Li;Junwen Zhang;Jianjun Yu
在实验中，我们演示了利用直接调制激光器在强度调制/直接检测系统中传输100Gb/S离散傅里叶变换(DFT)扩展32正交幅度调制(QAM)离散多音(DMT)信号。我们发现，在高速短距离光通信系统中，DFT扩展不仅可以降低峰均功率比，而且可以提高系统对高频功率衰减和窄带干扰的鲁棒性。利用窄带可调谐滤光片实现的残留边带(VSB)可用于直接检测后抵抗光纤色散引起的功率衰落效应。经过20公里大有效面积光纤传输后，100 Gb/S VSB DFT扩频DMT信号的误码率小于硬判决前向纠错(HD-FEC)限值3.8×10-3。
In this paper, we experimentally demonstrated transmission of a 100-Gb/s discrete Fourier transform (DFT)-spread 32-quadrature amplitude modulation (QAM) discrete multitone (DMT) signal in an intensity-modulation/direct-detection system utilizing a direct-modulated laser. We find that DFT-spread cannot only reduce the peak-to-average power ratio but also improve the robustness to high-frequency power attenuation and narrow-band interference in the high-speed short-reach optical communication systems. Vestigial sideband (VSB) enabled by a narrow-bandwidth tunable optical filter can be adopted to resist the power fading effect induced by the fiber chromatic dispersion after direct detection. The measured bit error ratio (BER) of 100-Gb/s VSB DFT-spread DMT signal after 20-km large effective area fiber is less than the hard-decision forward-error-correction (HD-FEC) limitation of3.8 ×10-3.