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Proceedings Paper

Indium single-ion optical frequency standard
Author(s): Thomas P. Becker; Mario Eichenseer; Alexander Yu Nevsky; Eckhard Peik; Christian Schwedes; Mikhail N. Skvortsov; Joachim von Zanthier; Herbert Walther
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Paper Abstract

Single laser-cooled ions in radiofrequency traps can serve as the basis for highly stable optical frequency standards. Here we present recent results on In+, using the 1S0 yields 3P0 line at 236.5 nm wavelength as the clock transition. This resonance has a natural linewidth of only 0.82 Hz and systematic shifts should be controllable at the mHz level. A single indium ion is stored in a miniature Paul- Straubel trap and laser cooled to a temperature of about 100 (mu) K. The clock transition is excited using a frequency quadrupled 946 nm Nd:YAG laser. A fractional resolution of 1.3 (DOT) 10-13 has been achieved so far (linewidth of 170 Hz at 1267 THz). The absolute optical frequency of the clock transition has been measured with an uncertainty being less than 3 (DOT) 10-13 using a frequency chain and a methane-stabilized HeNe laser that was calibrated with a cesium clock.

Paper Details

Date Published: 3 May 2001
PDF: 7 pages
Proc. SPIE 4269, Laser Frequency Stabilization, Standards, Measurement, and Applications, (3 May 2001); doi: 10.1117/12.424471
Show Author Affiliations
Thomas P. Becker, Max-Planck-Institut fuer Quantenoptik and Ludwig-Maximilians Univ. (Germany)
Mario Eichenseer, Max-Planck-Institut fuer Quantenoptik and Ludwig-Maximilians Univ. (Germany)
Alexander Yu Nevsky, Max-Planck-Institut fuer Quantenoptik and Institute of Laser Physics (Germany)
Eckhard Peik, Max-Planck-Institut fuer Quantenoptik and Ludwig-Maximilians-Univ. (Germany)
Christian Schwedes, Max-Planck-Institut fuer Quantenoptik and Ludwig-Maximilians-Univ. (Germany)
Mikhail N. Skvortsov, Max-Planck-Institut fuer Quantenoptik and Institute of Laser Physics (Germany)
Joachim von Zanthier, Max-Planck-Institut fuer Quantenoptik and Ludwig-Maximilians-Univ. (Germany)
Herbert Walther, Max-Planck-Institut fuer Quantenoptik and Ludwig-Maximilians-Univ. (Germany)


Published in SPIE Proceedings Vol. 4269:
Laser Frequency Stabilization, Standards, Measurement, and Applications
John L. Hall; Jun Ye, Editor(s)

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