Laser & Optoelectronics Progress, Volume. 57, Issue 5, 050004(2020)
Research Progress on Optical Fiber Time-Frequency Synchronization Technology
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![Principle diagram of time-frequency simultaneous transmission and synchronization experiment[3]](/Images/icon/loading.gif){kind=icon}
Fig. 1. Principle diagram of time-frequency simultaneous transmission and synchronization experiment[3]
Fig. 3. Bidirectional time transfer principle based on pseudo-random noise code[32]
Fig. 5. Principle block diagram of bidirectional time comparison method based on DWDM technology[24]
Fig. 6. Frequency synchronization experimental process diagram of LNE-SYRTE fiber in France[41]
Fig. 8. Schematic of optical comb pulse signal transmission synchronization scheme in Peking University[9]
Table 1. Technical characteristics of typical methods
View tableTable 1. Technical characteristics of typical methods
Technical types Timing methods Time accuracy Frequency stability Scope of action Advantages and disadvantages Radio time service long wave time service ~1 μs 1×10-12 d-1 3000 km(territory, territorial sea) wide application scope high reliability general accuracy Satellite timing TWSTFT ~1 ns 1×10-14 d-1 communication satellite coverage high accuracy good instantaneity easy to interfere Optical fiber time-frequency synchronization DWDM up to 10 ps 5×10-18 d-1 optical fiber range of action high accuracy accuracy usually decreases with distance
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Yifeng Liang, Jiangning Xu, Miao Wu, Hongyang He, Pengfei Jiang. Research Progress on Optical Fiber Time-Frequency Synchronization Technology[J]. Laser & Optoelectronics Progress, 2020, 57(5): 050004
Paper Information
Category: Reviews
Received: Jul. 1, 2019
Accepted: Aug. 27, 2019
Published Online: Mar. 5, 2020
The Author Email: Liang Yifeng (310714938@qq.com), Xu Jiangning (1431425578@qq.com)
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