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| Standard Frequency Signal Transfer Via Fiber and Its Application |
| CHEN Wei-liang,LI Tian-chu,SUO Rui,LIU Nian-feng,WANG Wei-bo,LIANG Kun |
| National Institute of Metrology, Beijing 100029, China |
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Abstract Based on previous research on fiber standard frequency signal transfer, some new fiber transfer system setups were established, and the standard frequency signals are transferring between NIM’s Changping campus and Hepingli campus and Beijing Satellite Navigation Center (BSNC).The noise induced by fiber links is sampled by double mixer time difference (DMTD) method and actively compensated. Transferring stability of fiber transfer systems were tested by cascaded transferring standard frequency signal between those locations, and result shows the transferring stability is better than 1×10-14 at averaging time 1s, and about 1×10-17 at averaging time one day. Based on the standard frequency signal transferring via those fiber transfer system setups, comparison between UTC(NIM) and UTC(BSNC) is carrying out, and optical clock tracing of NIM to fountain clock is also fulfilled by this more directly method instead of the GNSS method.
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2015, Vol. 36 
