Abstract：Optical fiber microwave time-frequency transfer technology has the advantages of high reliability, high stability, high precision, and low loss, it can provide a high-precision time-frequency reference for aerospace, national defense construction, high-speed communications and other industries. How to overcome the problems of low time synchronization accuracy, immature networking and integration technology in the existing technology, and at the same time ensure that the system will not cause a significant decrease in synchronization accuracy during long-distance transmission, becoming a core research issues in the field of optical fiber time-frequency transmission. The research progress of optical fiber microwave time-frequency transmission is reviewed, start from the traditional time transfer and frequency transfer technology, the new technology of integrated time-frequency transfer is introduced, finally, the application prospects of optical fiber microwave time-frequency transfer technology are prospected.
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2022, Vol. 43 
