| 引用本文: | 张浩，杨海峰，李璇，夏运霞，田思玉， 何磊，王世腾，瞿鹏飞，孙力军. 分布式宽带微波光纤传输幅相一致性技术[J]. 雷达科学与技术, 2021, 19(2): 178-182.[点击复制] |
| ZHANG Hao, YANG Haifeng, LI Xuan, XIA Yunxia, TIAN Siyu, HE Lei,WANG Shiteng, QU Pengfei, SUN Lijun. Amplitude-Phase Consistency of Wideband Microwave Frequency Distribution over Multi-Access Optical Fiber Links[J]. Radar Science and Technology, 2021, 19(2): 178-182.[点击复制] |
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| 摘要: |
| 针对分布式宽带微波频率信号光纤传输的幅相一致性，本文设计了一种反馈控制方案。由于无法通过待传输宽带微波信号直接获取光纤传输时延信息，引入了一个点频参考信号。由于参考信号和待传输宽带微波信号在同一根光纤中波分复用传输，参考信号可以感知和反馈光纤传输时延及其波动。为了满足多路信号接收的幅相一致性，设计了基于光开关的轮询式多路幅度和相位检测；为了实现高精度大范围光纤时延波动补偿，设计了基于光开关的多比特可调光纤延迟线。本文搭建了分布式宽带微波频率信号光纤传输实验平台，演示了两路宽带微波频率信号50km光纤传输实验。结果表明，两路微波信号在20GHz带宽范围内幅度一致性优于4.4dB，40GHz频率信号传输的相位一致性优于11.8°。 |
| 关键词: 光纤 分布式 宽带微波 幅相一致性 |
| DOI：DOI:10.3969/j.issn.1672-2337.2021.02.010 |
| 分类号:TN29 |
| 基金项目: |
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| Amplitude-Phase Consistency of Wideband Microwave Frequency Distribution over Multi-Access Optical Fiber Links |
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ZHANG Hao, YANG Haifeng, LI Xuan, XIA Yunxia, TIAN Siyu, HE Lei,WANG Shiteng, QU Pengfei, SUN Lijun
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1. Chongqing Optoelectronics Research Institute, Chongqing 400060, China;2. Southwest China Institute of Electronic Technology, Chengdu 610036, China;3. Institute of Optics and Electronics，Chinese Academy of Sciences, Chengdu 610209, China
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| Abstract: |
| In this paper, a feedback control scheme is proposed for the fiber-optic wideband microwave frequency distribution. Amplitude-phase consistency can be achieved for multi-access. Since the wideband microwave frequency cannot provide the fiber propagation delay and its variation, a reference frequency signal is introduced. With wavelength division multiplexing (WDM) transmission along the same fiber, the reference frequency signal can sense and feed back the fiber delay information. For the amplitude and phase detection, optical switch is adopted, which is of great importance in the time division multiplexing (TDM) mode. For the fiber delay compensation with high precision and large range, multi-bit fiber delay line is implemented. Moreover, a multi-access wideband microwave frequency distribution testbed is established. And a proof of concept experiment is demonstrated for two end users with the fiber extension of 50km. The amplitude consistency of less than 4.4dB is observed in a 20GHz bandwidth. And the phase consistency of below 11.8°is realized for the 40GHz frequency transmission. |
| Key words: multi-access wideband microwave amplitude-phase consistency |
