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首页> 外文期刊>Optical fiber technology >Enhanced noise tolerance for 10Gb/s Bi-directional cross-wavelength reuse colorless WDM-PON by using spectrally shaped OFDM signals
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Enhanced noise tolerance for 10Gb/s Bi-directional cross-wavelength reuse colorless WDM-PON by using spectrally shaped OFDM signals

机译：通过使用频谱成形的OFDM信号，增强了10Gb / s双向交叉波长复用无色WDM-PON的噪声容忍度

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摘要

Spectrally shaped orthogonal frequency division multiplexing (OFDM) signal for symmetric 10 Gb/s cross-wavelength reuse reflective semiconductor optical amplifier (RSOA) based colorless wavelength division multiplexed passive optical network (WDM-PON) is proposed and further analyzed to support broadband services of next generation high speed optical access networks. The generated OFDM signal has subcarriers in separate frequency ranges for downstream and upstream, such that the re-modulation noise can be effectively minimized in upstream data receiver. Moreover, the cross wavelength reuse approach improves the tolerance against Rayleigh backscattering noise due to the propagation of different wavelengths in the same feeder fiber. The proposed WDM-PON is successfully demonstrated for 25 km fiber with 16-QAM (quadrature amplitude modulation) OFDM signal having bandwidth of 2.5 GHz for 10 Gb/s operation and subcarrier frequencies in 3-5.5 GHz and DC-2.5 GHz for downstream (DS) and upstream (US) transmission respectively. The result shows that the proposed scheme maintains a good bit error rate (BER) performance below the forward error correction (FEC) limit of 3.8x10(-3) at acceptable receiver sensitivity and provides a high resilience against re-modulation and Rayleigh backscattering noises as well as chromatic dispersion.
机译：提出了基于对称无色波分复用无源光网络（WDM-PON）的对称10 Gb / s交叉波长复用反射半导体光放大器（WDM-PON）的频谱形状正交频分复用（OFDM）信号，并对其进行了进一步分析，以支持下一代高速光接入网。所产生的OFDM信号具有在下游和上游的单独频率范围内的子载波，使得可以在上游数据接收器中有效地最小化重新调制噪声。此外，交叉波长复用方法提高了对由于同一馈线光纤中不同波长的传播而引起的瑞利反向散射噪声的容忍度。所提议的WDM-PON已成功地在25 km光纤上通过16-QAM（正交幅度调制）OFDM信号进行了演示，其带宽为2.5 GHz，可进行10 Gb / s的操作，子载波频率为3-5.5 GHz，DC-2.5 GHz为下行链路（ DS）和上游（美国）传输。结果表明，所提出的方案在可接受的接收器灵敏度下，在低于3.8x10（-3）的前向纠错（FEC）限制的情况下，保持了良好的误码率（BER）性能，并提供了对重调制和瑞利反向散射噪声的高弹性以及色散。

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