Demonstration of Low-Cost EML Based 240 Gbit/s DFT-Spread DMT Signal Transmission Over Few-Mode Fiber With Cylindrical Vector Beam Multiplexing
Demonstration of Low-Cost EML Based 240 Gbit/s DFT-Spread DMT Signal Transmission Over Few-Mode Fiber With Cylindrical Vector Beam Multiplexing
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DOI：
10.1109/access.2019.2919512
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发表时间：
2019
期刊：
影响因子：
3.9
通讯作者：
Yidan Sun;Dongdong Zou;Jianping Li;Fan Li;X. Yi;Z. Li
中科院分区：
文献类型：
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作者：
Yidan Sun;Dongdong Zou;Jianping Li;Fan Li;X. Yi;Z. Li
在本文中，我们实验证明了高速低成本的模分复用（MDM）离散多音（DMT）信号传输的基础上，圆柱矢量光束（CVB）复用少模光纤（FMF）的强度调制和直接检测（IM/DD）利用电吸收调制激光器（EML）。采用两个CVB（TM 01和TE 01模式）的信号传输同时与最小模式之间的隔离度为16.7 dB的传输后，在5米4模FMF。发射端采用数字离散傅里叶变换扩频（DFT扩频）和预均衡技术，提高了系统性能。通过采用所提出的方案，240 Gbit/s DFT扩频DMT信号已成功地传输超过5 m FMF低于误码率（BER）为3.8 × 10 - 3 $，这是硬判决前向纠错（HD-FEC）的阈值。两个CVB（TM 01和TE 01模式）所需的接收光功率（ROP）分别为−7.27 dBm和−7.15 dBm。实验结果表明，基于CVB的复用技术结合先进的调制格式可以成为一个潜在的候选人，高速低成本的服务器背板光互连。
In this paper, we experimentally demonstrated the high-speed low-cost mode-division-multiplexed (MDM) discrete multi-tone (DMT) signal transmission based on cylindrical vector beam (CVB) multiplexing over few-mode fiber (FMF) with intensity modulation and direct detection (IM/DD) utilizing electro-absorption modulated laser (EML). Two CVBs (TM01 and TE01 modes) are employed for signal transmission simultaneously with the minimum mode isolation of 16.7 dB between them after transmission over 5 m 4-mode FMF. The digital discrete Fourier transform-spread (DFT-spread) and pre-equalization techniques are implemented in transmitter to improve the system performance. By adopting the proposed schemes, the 240 Gbit/s DFT-spread DMT signal has been transmitted successfully over 5 m FMF below the bit-error-ratio (BER) of $3.8\times 10^{-3}$ which is the hard-decision forward-error-correction (HD-FEC) threshold. The required received optical powers (ROPs) of the two CVBs (TM01 and TE01 modes) are −7.27 dBm and −7.15 dBm, respectively. The experimental results show that CVB-based multiplexing technology combined with advanced modulation format could be a potential candidate for high-speed low-cost server backplane optical interconnection.