The absolute frequency of the 87Sr optical clock transition
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The absolute frequency of the 87Sr optical clock transition. / Campbell, Gretchen K.; Ludlow, Andrew D.; Blatt, Sebastian; Thomsen, Jan W.; Martin, Michael J.; de Miranda, Marcio H. G.; Zelevinsky, Tanya; Boyd, Martin M.; Ye, Jun; Diddams, Scott A.; Heavner, Thomas P.; Parker, Thomas E.; Jefferts, Steven R.
In: Metrologia, Vol. 45, No. 5, 2008, p. 539-548.Research output: Contribution to journal › Journal article › Research › peer-review
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TY - JOUR
T1 - The absolute frequency of the 87Sr optical clock transition
AU - Campbell, Gretchen K.
AU - Ludlow, Andrew D.
AU - Blatt, Sebastian
AU - Thomsen, Jan W.
AU - Martin, Michael J.
AU - de Miranda, Marcio H. G.
AU - Zelevinsky, Tanya
AU - Boyd, Martin M.
AU - Ye, Jun
AU - Diddams, Scott A.
AU - Heavner, Thomas P.
AU - Parker, Thomas E.
AU - Jefferts, Steven R.
PY - 2008
Y1 - 2008
N2 - The absolute frequency of the 1S0–3P0 clock transition of 87Sr has been measured to be 429 228 004 229 873.65 (37) Hz using lattice-confined atoms, where the fractional uncertainty of 8.6 × 10-16 represents one of the most accurate measurements of an atomic transition frequency to date. After a detailed study of systematic effects, which reduced the total systematic uncertainty of the Sr lattice clock to 1.5 × 10-16, the clock frequency is measured against a hydrogen maser which is simultaneously calibrated to the US primary frequency standard, the NIST Cs fountain clock, NIST-F1. The comparison is made possible using a femtosecond laser based optical frequency comb to phase coherently connect the optical and microwave spectral regions and by a 3.5 km fibre transfer scheme to compare the remotely located clock signals.
AB - The absolute frequency of the 1S0–3P0 clock transition of 87Sr has been measured to be 429 228 004 229 873.65 (37) Hz using lattice-confined atoms, where the fractional uncertainty of 8.6 × 10-16 represents one of the most accurate measurements of an atomic transition frequency to date. After a detailed study of systematic effects, which reduced the total systematic uncertainty of the Sr lattice clock to 1.5 × 10-16, the clock frequency is measured against a hydrogen maser which is simultaneously calibrated to the US primary frequency standard, the NIST Cs fountain clock, NIST-F1. The comparison is made possible using a femtosecond laser based optical frequency comb to phase coherently connect the optical and microwave spectral regions and by a 3.5 km fibre transfer scheme to compare the remotely located clock signals.
U2 - 10.1088/0026-1394/45/5/008
DO - 10.1088/0026-1394/45/5/008
M3 - Journal article
VL - 45
SP - 539
EP - 548
JO - Metrologia
JF - Metrologia
SN - 0026-1394
IS - 5
ER -
ID: 17270310