Matsuura Motoharu, Furukawa Rei, Matsumoto Yuki, Inoue Azusa, Koike Yasuhiro
Opt Express. 2014 Mar 24;22(6):6562-8. doi: 10.1364/OE.22.006562.
We have evaluated and compared modal noise induced in a graded-index silica multimode fiber (GI-MMF) link and a graded-index plastic optical fiber (GI-POF) link with the misaligned fiber connections. In radio over fiber (RoF) systems using these optical fibers, modal noise appears as unwanted amplitude modulation in the received signal, and results in degradation of the RoF transmission performance. In this work, we have evaluated the modal noise induced in GI-MMFs and GI-POFs with its same core diameter of 50 μm. Our results show that GI-POFs have an inherently higher tolerance to misaligned connection and less modal noise than GI-MMFs in terms of both the error-vector magnitude and the speckle pattern of the transmitted signals.
我们评估并比较了渐变折射率石英多模光纤（GI-MMF）链路和渐变折射率塑料光纤（GI-POF）链路在光纤连接未对准情况下产生的模式噪声。在使用这些光纤的光纤无线电（RoF）系统中，模式噪声表现为接收信号中不需要的幅度调制，并导致RoF传输性能下降。在这项工作中，我们评估了纤芯直径均为50μm的GI-MMF和GI-POF中产生的模式噪声。我们的结果表明，就传输信号的误差矢量幅度和散斑图案而言，GI-POF对未对准连接具有固有的更高耐受性，并且比GI-MMF产生的模式噪声更少。
