Broadband chromatic-dispersion-induced power-fading compensation for radio-over-fiber links based on Hilbert transform.
Broadband chromatic-dispersion-induced power-fading compensation for radio-over-fiber links based on Hilbert transform.
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DOI：
10.1364/ol.44.000155
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发表时间：
2019
期刊：
影响因子：
3.6
通讯作者：
M. Lei;Zhennan Zheng;Jinwang Qian;Mutong Xie;Yunping Bai;Xinlu Gao;Shanguo Huang
中科院分区：
文献类型：
--
作者：
M. Lei;Zhennan Zheng;Jinwang Qian;Mutong Xie;Yunping Bai;Xinlu Gao;Shanguo Huang
提出了一种基于希尔伯特变换的光纤无线链路宽带色散补偿方案，并进行了实验验证。通过构造希尔伯特变换路径，CD引起的相移（其最初导致输出RF信号的周期性功率衰落）被转移到RF信号的相位。结果，输出RF信号的功率在宽带频率范围内不受CD的影响。实验结果表明，在2-24 GHz范围内，该光纤具有平坦的归一化幅频响应，在38.6 km/43.6 km单模光纤上传输后，功率波动仅为3.02 dB/4.27 dB。此外，与传统的色散路径相比，所提出的CD补偿方案显着提高了三阶无杂散动态范围23.60 dB。
A Hilbert-transform-based broadband chromatic dispersion (CD) compensation scheme for radio-over-fiber links is proposed and experimentally demonstrated. By constructing a Hilbert transform path, CD-induced phase shifts, which initially lead to periodic power fading of the output RF signals, are transferred to the phases of the RF signals. As a result, the powers of the output RF signals are free from the effect of CD in a broadband frequency range. Experimental results show that a flat normalized amplitude-frequency response is actualized within 2-24 GHz, with only 3.02 dB/4.27 dB power fluctuation after transmission over an equivalent of a 38.6 km/43.6 km single-mode fiber. Besides, compared with a conventional dispersive path, the proposed CD compensation scheme significantly improves the third-order spurious-free dynamic range by 23.60 dB.