| Coherent Optical Frequency Transfer via a 490 km Noisy Fiber Link |
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| 作者姓名： | 张翔 邓雪 臧琦 焦东东 高静 王丹 周茜 刘杰 许冠军 董瑞芳 刘涛 张首刚 |
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| 作者单位： | 1. National Time Service Center Chinese Academy of Sciences;2. University of Chinese Academy of Sciences;3. Key Laboratory of Time and Frequency Standards Chinese Academy of Sciences |
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| 基金项目： | supported by the National Key Research and Development Program of China (Grant No. 2016YFF0200200)；;the National Natural Science Foundation of China (Grant Nos. 91636101, 12103059, 91836301, and 11803041)；;the West Light Foundation of the Chinese Academy of Sciences (Grant No. XAB2016B47)； |
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| 摘 要： | We demonstrate the coherent transfer of an ultrastable optical frequency reference over a 490 km noisy field fiber link. The fiber-induced phase noise power spectrum density per-unit-length at 1 Hz offset frequency can reach up to 510 rad2·Hz-1·km-1, which is much higher than the fiber noise observed in previous reports. This extreme level of phase noise is mainly due to the fiber link laying underground along the highway. Appropriate phaselocked loop parameters ...
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