Title :
A microwave frequency standard based on laser-cooled /sup 171/Yb/sup +/ ions
Author :
Warrington, R.B. ; Fisk, P.T.H. ; Wouters, M.J. ; Lawn, M.A.
Author_Institution :
Nat. Meas. Lab., CSIRO, Sydney, NSW, Australia
Abstract :
We report operation of a microwave frequency standard based on the 12.6 GHz ground-state hyperfine transition in a cloud of laser-cooled /sup 171/Yb/sup +/ ions. The projected performance of this standard (frequency uncertainty /spl les/ 4 /spl times/ 10/sup -15/ and stability 5 /spl times/ 10/sup -14/ /spl tau//sup -1/2/ for a 10 s Ramsey time) is comparable to that of a cesium fountain.
Keywords :
frequency stability; frequency standards; ground states; hyperfine interactions; laser cooling; measurement uncertainty; microwave measurement; trapped ions; ytterbium; /sup 171/Yb/sup +/; 10 s; 12.6 GHz; Ramsey time; frequency uncertainty; ground-state hyperfine transition; laser-cooled /sup 171/Yb/sup +/ ions; microwave frequency standard; stability; Clouds; Cooling; Doppler shift; Heating; Laser transitions; Masers; Microwave frequencies; Stability; Temperature; Uncertainty;
Conference_Titel :
Precision Electromagnetic Measurements, 2002. Conference Digest 2002 Conference on
Conference_Location :
Ottawa, Ontario, Canada
Print_ISBN :
0-7803-7242-5
DOI :
10.1109/CPEM.2002.1034765
