Intermodulation distortion suppression for intensity-modulated analog fiber-optic link incorporating optical carrier band processing.
Intermodulation distortion suppression for intensity-modulated analog fiber-optic link incorporating optical carrier band processing.
复制标题
DOI：
10.1364/oe.21.023433
复制
发表时间：
2013-10
期刊：
影响因子：
3.8
通讯作者：
Yan Cui;Yitang Dai;Feifei Yin;Jian Dai;Kun Xu;Jianqiang Li;Jintong Lin
中科院分区：
文献类型：
--
作者：
Yan Cui;Yitang Dai;Feifei Yin;Jian Dai;Kun Xu;Jianqiang Li;Jintong Lin
提出了一种基于光载波频带处理的互调失真抑制方法。系统地分析了非线性系统中三阶互调失真的主要光谱贡献者。理论分析表明，如果对光载波带施加适当的相移，三阶互调失真项可以相互抵消。我们实验证明了这种方法与一个双音测试和抑制约33 dB的三阶互调失真得到。实验结果表明，与未采用光载波带处理的传统链路相比，该方法可使基频到三阶互调失真比达到64 dB，链路动态范围提高了14.7 dB。
An intermodulation distortion suppression method based on the optical carrier band processing is demonstrated. A systematic analysis of the main optical spectrum contributors for the third-order intermodulation distortion in the nonlinear system is presented. Theoretical analysis shows that the third-order intermodulation distortion terms can cancel each other if a proper phase shifting is imposed to the optical carrier band. We experimentally demonstrate the approach with a two-tone test and a suppression of about 33 dB in the third-order intermodulation distortion is obtained. Experimental results show that an overall fundamental to third-order intermodulation distortion ratio of up to 64 dB is achieved and the link dynamic range is improved by 14.7 dB, compared with the conventional link without the proposed optical carrier band processing.