TY - GEN
T1 - Advances in strontium optical lattice clocks at NIM
AU - Sun, Zhen
AU - Yang, Tao
AU - Lin, Yige
AU - Wang, Qiang
AU - Li, Ye
AU - Lu, Bingkun
AU - Meng, Fei
AU - Cao, Shiying
AU - Lin, Baike
AU - Li, Tianchu
AU - Fang, Zhanjun
N1 - Publisher Copyright:
© 2020 SPIE.
PY - 2020
Y1 - 2020
N2 - Two strontium optical lattice clocks (Sr1 and Sr2) are being built at National Institute of Metrology(NIM) of China. Sr1 was firstly evaluated in 2015, and later equipped with a new clock laser based on a 30 cm reference cavity, which helped to improve its stability. Sr2 is built on a new campus of NIM, which has some different designs compared to Sr1, for example, a permanent magnets based Zeeman slower, a differential pumping stage, and a robust laser system. A time interleaved self-comparison campaign of Sr2 of more than 7 days shows an up-time of ∼90% and a measurement stability of 3.7×10-15/âsooe with a 10 cm ULE cavity based clock laser. The link between these two optical clocks, that consists of two fiber optical frequency combs and a 54 km fiber connection, are being constructed. The comparison of these two clocks is planned in the near future.
AB - Two strontium optical lattice clocks (Sr1 and Sr2) are being built at National Institute of Metrology(NIM) of China. Sr1 was firstly evaluated in 2015, and later equipped with a new clock laser based on a 30 cm reference cavity, which helped to improve its stability. Sr2 is built on a new campus of NIM, which has some different designs compared to Sr1, for example, a permanent magnets based Zeeman slower, a differential pumping stage, and a robust laser system. A time interleaved self-comparison campaign of Sr2 of more than 7 days shows an up-time of ∼90% and a measurement stability of 3.7×10-15/âsooe with a 10 cm ULE cavity based clock laser. The link between these two optical clocks, that consists of two fiber optical frequency combs and a 54 km fiber connection, are being constructed. The comparison of these two clocks is planned in the near future.
KW - electronic sideband locking
KW - precision spectroscopy
KW - strontium optical lattice clock
KW - time interleaved self-comparison
UR - https://www.scopus.com/pages/publications/85083029590
U2 - 10.1117/12.2552695
DO - 10.1117/12.2552695
M3 - Conference contribution
AN - SCOPUS:85083029590
T3 - Proceedings of SPIE - The International Society for Optical Engineering
BT - Optical, Opto-Atomic, and Entanglement-Enhanced Precision Metrology II
A2 - Shahriar, Selim M.
A2 - Scheuer, Jacob
PB - SPIE
T2 - Optical, Opto-Atomic, and Entanglement-Enhanced Precision Metrology II 2020
Y2 - 1 February 2020 through 6 February 2020
ER -