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首页> 外文期刊>Journal of Optics >SNDR optimization of linearized Mach-Zehnder modulator for multi-tone RoF system
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SNDR optimization of linearized Mach-Zehnder modulator for multi-tone RoF system

机译：用于多音ROF系统的线性化Mach-Zehnder调制器的SNDR优化

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摘要

Radio-over-fiber (RoF) system will be recognized as backbone for next-generation networks by offering capacity, simplicity in design, cost-effectiveness, green communication, etc. But the crucial performance degrading bound for RoF system is third-order intermodulation (IM3) error when high signal input power is employed. In this regard, this paper presents an analytical analysis with verified simulation of three radio frequency signals incorporating dispersion and single sideband modulation technique. This paper illustrates the results to reduce nonlinear distortion errors by selecting the medium values of the modulation index and proper fixed frequency differences between input signals for transmission distances of 25 km and beyond. The performance of multi-tone RoF system is further improved by employing linearization technique. The two linear polarizers are placed before and after Mach-Zehnder modulator. The IM3 can be significantly suppressed by properly selecting the angles between two linear polarizers.
机译：通过提供容量，设计，成本效益，绿色通信等的能力，简单，无线电过光纤（ROF）系统将被识别为下一代网络的骨干。但是对于ROF系统的关键性能降级是第三阶互调（IM3）采用高信号输入功率时出错。在这方面，本文介绍了一种分析分析，验证了包含色散和单边带调制技术的三个射频信号的验证模拟。本文说明了通过选择调制指数的介质值和输入信号之间的适当固定频率差异来减少非线性失真误差的结果，用于传输距离为25km及更远的传输距离。通过采用线性化技术进一步提高了多音rof系统的性能。两个线性偏振器放在马赫 - Zehnder调制器之前和之后。通过适当地选择两个线性偏振器之间的角度，可以显着抑制IM3。

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