Abstract

A system is described for the absolute frequency measurement of a laser source at 445 THz probing a narrow resonance of a trapped single ion of strontium. The 474-THz frequency from a laser referenced to an iodine-stabilized helium–neon laser and a known 29-THz frequency from a saturation-stabilized carbon dioxide laser are mixed in an AgGaS₂ nonlinear crystal to synthesize the 445–THz radiation. A preliminary measurement of the ⁸⁸Sr⁺ 5s²S_1/2 −4d ² D_5/2 center frequency yielded a frequency of 444 779 044.14 ± 0.39 MHz (1σ).

© 1996 Optical Society of America

Absolute-frequency measurement of the narrow-linewidth 24-THz D–D transition of a Single laser-cooled barium ion

B. G. Whitford, K. J. Siemsen, A. Madej, and J. D. Sankey
Opt. Lett. 19(5) 356-358 (1994)

Observation of the 5s²S_1/2−4d²D_5/2 transition in a single laser-cooled trapped Sr⁺ ion by using an all-solid-state system of lasers

G. P. Barwood, C. S. Edwards, P. Gill, H. A. Klein, and W. R. C. Rowley
Opt. Lett. 18(9) 732-734 (1993)

Absolute frequency measurement of the In⁺ clock transition with a mode-locked laser

J. von Zanthier, Th. Becker, M. Eichenseer, A. Yu. Nevsky, Ch. Schwedes, E. Peik, H. Walther, R. Holzwarth, J. Reichert, Th. Udem, T. W. Hänsch, P. V. Pokasov, M. N. Skvortsov, and S. N. Bagayev
Opt. Lett. 25(23) 1729-1731 (2000)

Single, trapped Sr⁺ atom: laser cooling and quantum jumps by means of the 4d²D_5/2–5s²S_1/2 transition

A. A. Madej and J. D. Sankey
Opt. Lett. 15(11) 634-635 (1990)

Direct comparison of a Ca⁺ single-ion clock against a Sr lattice clock to verify the absolute frequency measurement

Kensuke Matsubara, Hidekazu Hachisu, Ying Li, Shigeo Nagano, Clayton Locke, Asahiko Nogami, Masatoshi Kajita, Kazuhiro Hayasaka, Tetsuya Ido, and Mizuhiko Hosokawa
Opt. Express 20(20) 22034-22041 (2012)