supported by the National Natural Science Foundation of China (Grant Nos. 11874090, 91536106, 61127901, 11404025, and U1530142);the Strategic Priority Research Program of CAS (Grant No. XDB21030100);the Key Research Project of Frontier Science of CAS (Grant No. QYZDB-SSW-JSC004);the West Light Foundation of CAS (Grant No. XAB2018B17)。
We conducted measurement and calculation to resolve the long-standing large discrepancy in the metastable state lifetime for the ^(88)Sr atom between theoretical and experimental results. The present lifetime τ = 830...
National Natural Science Foundation of China(Grant Nos.61825505,91536217,and 61127901).
We demonstrate the transmission of a microwave frequency signal at 10 GHz over a 112-km urban fiber link based on a novel simple-architecture electronic phase compensation system.The key element of the system is the l...
Project supported by the National Natural Science Foundation of China(Grant Nos.91536217,61127901,and 11775253);the Youth Innovation Promotion Association of the Chinese Academy of Sciences(Grant No.2015334);The authors would like to thank special funds for scientific equipment development(YZ201518)from Chinese academy of sciences for the use of the developed equipment
We demonstrate the ultra-stable frequency sources aiming to improve the short-time instability of primary frequency standards.These sources are realized by using photonic generation approach,and composed of ultra-stab...
国家授时中心保持的协调世界时UTC(NTSC)(Coordinated Universal Time,National Time Service Center)与UTC的偏差保持在±10ns以内。为了使远程用户获得高精度的UTC(NTSC)时间频率信号,利用国家授时中心保持的UTC(NTSC)时频信...