Transmission Performance of Adaptively Modulated Optical OFDM Modems Using Subcarrier Modulation over Worst-Case Multimode Fibre Links
Transmission Performance of Adaptively Modulated Optical OFDM Modems Using Subcarrier Modulation over Worst-Case Multimode Fibre Links
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DOI：
10.1109/lcomm.2008.080930
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发表时间：
2008-10
期刊：
影响因子：
--
通讯作者：
X. Zheng;J. Tang;P. Spencer
中科院分区：
文献类型：
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作者：
X. Zheng;J. Tang;P. Spencer
首次提出了一种基于副载波调制的自适应调制光正交频分复用调制解调器(AMOofdm-SCM)，该调制解调器由两个传统的AMOofdm调制解调器组成，一个在基带工作，另一个被调制到中间射频(RF)载波上。在使用强度调制和直接检测的单信道、无光放大器、最差情况下的多模光纤(MMF)链路中，对AMOOFDM-SCM调制解调器的传输性能进行了数值模拟。结果表明，根据实际可用的射频组件，在上述带宽为292.5 MHz的MMF链路上，至少在500 m以上的GB/S和1000 m以上的37 GB/S的AMOFDMSCM信号传输是可行的。此外，与AMOOFDM技术相比，为了达到所需的信号传输容量，AMOFDMSCM还显著放宽了对关键组件参数的要求，提高了灵活性和稳健性，并更有效地利用了MMF链路的频谱特性。
An adaptively modulated optical orthogonal frequency division multiplexing (AMOOFDM) modem using subcarrier modulation (SCM) (AMOOFDM-SCM) is proposed, for the first time, which consists of two conventional AMOOFDM modems in parallel with one operating at the baseband and the other being modulated onto an intermediate radio frequency (RF) carrier. Numerical simulations of the transmission performance of the AMOOFDM-SCM modems are undertaken in single-channel, optical amplifier-free, worst-case multimode fibre (MMF) links using intensity modulation and direct detection. It is shown that, based on practically available RF components, at least 64 Gb/s over 500 m and 37 Gb/s over 1000 m AMOOFDMSCM signal transmission is feasible in the aforementioned MMF links having 3-dB bandwidths as small as 292.5 MHz.km. In addition, when compared against the AMOOFDM technique, for achieving a required signal transmission capacity, AMOOFDMSCM also reveals significantly relaxed requirements on key component parameters, improved flexibility and robustness and more efficient use of MMF link spectral properties.