Dispersion Compensation in Analog Photonic Link Utilizing a Phase Modulator

Dispersion Compensation in Analog Photonic Link Utilizing a Phase Modulator
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使用相位调制器的模拟光子链路中的色散补偿

DOI:
10.1109/jlt.2014.2362916
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发表时间:
2014-12
影响因子:
4.7
通讯作者:
Zou, Xihua
Zou, Xihua
中科院分区:
工程技术2区
文献类型:
--
作者:
Jiang, Hengyun;Pan, Wei;Luo, Bin;Zou, Xihua

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首先提出了一种利用相位调制器与偏振器相结合的简单色散补偿方案。适当调整输入偏振态,可以控制色散链路的频率响应。实验结果表明,在40 km和65 km传输中,14 GHz和10.8 GHz频段的色散诱发功率衰落(PF)得到了充分的最大化或补偿。此外,在40 km光纤传输中,模拟光子链路的无杂散动态范围提高到96 dB·Hz2/3,比基于相位调制的链路提高了12 dB。另一方面,进一步论证了一种改进的CD补偿方案,该方案采用偏振光束合并器代替偏振器。该方法可以等效于前两种方案的和,从而实现宽带CD补偿。在这种情况下,对于带宽高达15 GHz的RF信号,PF得到了极大的缓解。同时,误差矢量幅度减小至~5%,波动幅度仅为0.7%。
A simple chromatic dispersion (CD) compensation scheme for a certain frequency is first proposed by utilizing a phase modulator in conjunction with a polarizer. Properly adjusting the input polarization states, the frequency response of the dispersive link can be controlled. Experimental results show that the dispersion-induced power fading (PF) occurred at 14 and 10.8 GHz over 40- and 65-km transmission is fully maximized or compensated. Furthermore, the spurious-free dynamic range of the proposed analog photonic link is improved to 96 dB·Hz2/3 for the 40-km fiber transmission, which is 12 dB higher than that of the phase modulation-based link. On the other hand, an improved scheme for CD compensation is further demonstrated, where a polarization beam combiner is employed instead of a polarizer. Such an approach achieves the broadband CD compensation since it can be equivalent to the sum of two first schemes. In this case, the PF is greatly mitigated for the RF signal with a bandwidth up to 15 GHz. Meanwhile, the error vector magnitude reduces to ~5% with the fluctuation of only 0.7%.
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