Wideband Microwave Frequency Distribution for Multi-Access Along a Single Fiber Link
Wideband Microwave Frequency Distribution for Multi-Access Along a Single Fiber Link
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DOI：
10.1109/jlt.2019.2961327
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发表时间：
2020-04
影响因子：
4.7
通讯作者：
Hao Zhang;Lei He;Xuan Li;Yongchuan Xiao;Pengfei Qu;Lijun Sun
中科院分区：
文献类型：
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作者：
Hao Zhang;Lei He;Xuan Li;Yongchuan Xiao;Pengfei Qu;Lijun Sun
本文提出了一种稳定的宽带微波频率分布的光纤信号接入方法。结合抽头反向传播参考信号和可变光延迟线(VODL)，可以在主光纤链路上的任何接入点(AP)获得稳定的宽带微波频率信号。此外，接收到的宽带微波频率的所有相位都可以对准。这样，由于中心站只稳定主光纤链路时延，而接入端(AN)独立运行，因此可以分散整个系统的复杂性。实验上，在一条50公里的色散补偿光纤链路上，展示了一种多址宽带微波频率分布。对系统优秀度进行了详细的研究。结果表明，光纤宽带微波频率传输系统可以工作在40 GHz以上的频率范围内。对于1 KHZ频率信号，远端(RN)的附加相位噪声为−125dBc/Hz，AN的附加相位噪声为−131dBc/Hz。由于采用了主动延迟稳定器，RN的Allan偏差分别为1.3×10−13/S和2.4×10−15/10 S，AN的Allan偏差分别为8.8×10−14/S和4.4×10−15/100 S。
In this paper, a fiber-optic signal access method is proposed for stable wideband microwave frequency distribution. Incorporating with the tapped counter-propagating reference signals and variable optical delay lines (VODLs), a stable wideband microwave frequency signal can be obtained at any access point (AP) along the main fiber link. Moreover, all the phases of received wideband microwave frequency can be aligned. In this way, the whole system complexity can be dispersed as the central station only stabilizes the main fiber link delay, and the access ends (ANs) operate independently. Experimentally, a multi-access wideband microwave frequency distribution is demonstrated over a 50 km dispersion-compensated fiber link. A system figure of merit is investigated in detail. The results show that the fiber-optic wideband microwave frequency transmission system can operate for the frequency over 40 GHz. The additive phase noises of −125 dBc/Hz for the remote end (RN), and −131 dBc/Hz for the AN, respectively, are achieved at the 1 kHz offset frequency for a 1 GHz frequency signal. Thanks to the active delay stabilization, the Allan deviation (ADEV) of 1.3 × 10−13 /s and 2.4 × 10−15 /100 s for the RN, and the one of 8.8 × 10−14 /s and 4.4 × 10−15 /100 s for the AN, respectively, are acquired.