首页> 外文期刊>Selected Areas in Communications, IEEE Journal on >Performance Comparison of OFDM-UWB Radio Signals Distribution in Long-Reach PONs Using Mach-Zehnder and Linearized Modulators
【24h】

Performance Comparison of OFDM-UWB Radio Signals Distribution in Long-Reach PONs Using Mach-Zehnder and Linearized Modulators

机译:使用Mach-Zehnder和线性化调制器的长距离PON中OFDM-UWB无线电信号分布的性能比较

获取原文
获取原文并翻译 | 示例
       

摘要

The performance of orthogonal frequency division multiplexing ultra wideband (UWB) radio signals distribution in long-reach passive optical networks (LR-PONs) using conventional chirp-less Mach Zehnder (MZ) and linearized (L) Y-fed directional couplers electro-optic modulators (EOMs) is compared. Particularly, the optimum modulation index and the corresponding minimum optical signal-to-noise ratio (OSNR) required to achieve a bit error probability of 10-12 are evaluated through numerical simulation for systems operating with single and three UWB sub-bands and different standard single-mode fiber (SSMF) distances indicated for LR-PONs. Both modulators are characterized experimentally and theoretical model parameters are adjusted to correctly describe the power and chirp characteristics of the electro-optic conversion in the simulation process. It is shown that the optimum modulation index and the tolerance to modulation index variations, considering either single or multi band UWB operation, is approximately two times higher for systems employing L-EOM than MZ-EOM. Additionally, with MZ-EOM, the required OSNR may increase considerably when the fiber length increases due to the power fading induced by fiber chromatic dispersion, achieving a penalty of almost 3 dB for systems with 100 km of SSMF and single UWB sub-band operation. Instead, with L-EOM, the required OSNR penalty (when compared with the back-to-back case) is lower for fiber lengths up to 100 km than it is for systems employing the MZ-EOM modulator due to the combined effect of the chirp generated by the modulator and the chromatic dispersion.
机译:使用传统的无chi Mach Zehnder(MZ)和线性(L)Y馈电定向耦合器在长距离无源光网络(LR-PON)中进行正交频分复用超宽带(UWB)无线电信号分配的性能比较调制器(EOM)。特别是,对于在单个和三个UWB子带和不同标准下工作的系统,通过数值模拟评估了达到10-12的误码率所需的最佳调制指数和相应的最小光信噪比(OSNR)。 LR-PON的单模光纤(SSMF)距离。两种调制器均经过实验表征,并调整了理论模型参数以正确描述仿真过程中电光转换的功率和线性调频特性。结果表明,考虑到单频带或多频带UWB操作,最优调制指数和对调制指数变化的容忍度对于采用L-EOM的系统来说要比MZ-EOM高大约两倍。此外,使用MZ-EOM时,由于光纤色散引起的功率衰减而导致光纤长度增加时,所需的OSNR可能会显着增加,对于具有100 km SSMF和单个UWB子带工作的系统,几乎会损失3 dB 。取而代之的是,对于L-EOM,由于其综合效果,对于100公里以下的光纤,所需的OSNR损失(与背靠背情况相比)要比采用MZ-EOM调制器的系统低。调制器产生的线性调频和色散。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱:kefu@zhangqiaokeyan.com

京公网安备:11010802029741号 ICP备案号:京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有
  • 客服微信

  • 服务号