Title :
Absolute frequency measurement of 115In+ clock transition
Author :
Wang, Y.H. ; Liu, T. ; Dumke, R. ; Stejskal, A. ; Zhao, Y.N. ; Zhang, J. ; Lu, Z.H. ; Wang, L.J. ; Becker, Th ; Walther, H.
Author_Institution :
Inst. of Opt., Inf. & Photonics, Erlangen
Abstract :
We report recent improvement in absolute frequency measurement of the 115In+5s2 1S0-5s5p 3P0 clock transition at 236.5 nm. Using a narrowline laser as a local oscillator, a linewidth of 43 Hz for the transition is resolved. The uncertainty of the transition frequency´s centroid is 18 Hz, leading to a fractional uncertainty of 1.4 x 10-14. In the experiment, a single 115In+is trapped in a three-ring Paul-Straubel trap and laser cooled to the trap´s vibrational ground states.
Keywords :
clocks; frequency measurement; indium; laser cooling; vibrational states; In; absolute frequency measurement; clock transition; fractional uncertainty; frequency 43 Hz; laser cooling; local oscillator; narrowline laser; three ring Paul Straubel trap; vibrational ground states; wavelength 236.5 nm; Clocks; Electrons; Frequency measurement; Laser theory; Laser transitions; Local oscillators; Photonics; Resonance; Ring lasers; Stationary state;
Conference_Titel :
Lasers and Electro-Optics, 2007 and the International Quantum Electronics Conference. CLEOE-IQEC 2007. European Conference on
Conference_Location :
Munich
Print_ISBN :
978-1-4244-0931-0
Electronic_ISBN :
978-1-4244-0931-0
DOI :
10.1109/CLEOE-IQEC.2007.4386817
