Optical fiber microwave frequency transfer system for loop optical fiber link

• Main Authors: HU LIANG, WU GUILING, SHI PINGYANG, CHEN JIANPING, KONG MENGYA
• Format: Patent
• Language: Chinese; English
• Published: 08.11.2019
• Subjects: ELECTRIC COMMUNICATION TECHNIQUE; ELECTRICITY; TRANSMISSION

An optical fiber microwave frequency transmission system for a loop optical fiber link comprises a central end, an optical fiber link and access ends. The access ends can be distributed at any position on the annular optical fiber link connected with the central end. The influence of backscattering noise is avoided. The signal-to-noise ratio of a received signal is improved. The short-term stability of frequency transmission is improved. Meanwhile, wavelength asymmetry introduced by using a wavelength division multiplexing transmission mode is avoided. The influence of wavelength intervals onlong-term stability of frequency transmission is avoided. 一种用于环形光纤网络的光纤微波频率传递系统，包括中心端、光纤链路和接入端，接入端可分布在连接所述的中心端的环形光纤链路上任一位置。本发明避免了后向散射噪声的影响，提高接收信号的信噪比，有利于提高频率传递短期稳定性；同时，避免了使用波分复用传递方式引入的波长不对称性，避免波长间隔对频率传递长期稳定性的影响。