Indium single-ion optical frequency standard

Thomas P. Becker; Mario Eichenseer; Alexander Yu Nevsky; Eckhard Peik; Christian Schwedes; Mikhail N. Skvortsov; Joachim von Zanthier; Herbert Walther

doi:10.1117/12.424471

3 May 2001 Indium single-ion optical frequency standard

Thomas P. Becker, Mario Eichenseer, Alexander Yu Nevsky, Eckhard Peik, Christian Schwedes, Mikhail N. Skvortsov, Joachim von Zanthier, Herbert Walther

Author Affiliations +

Proceedings Volume 4269, Laser Frequency Stabilization, Standards, Measurement, and Applications; (2001) https://doi.org/10.1117/12.424471
Event: Photonics West 2001 - LASE, 2001, San Jose, CA, United States

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.

Citation Download Citation

Thomas P. Becker, Mario Eichenseer, Alexander Yu Nevsky, Eckhard Peik, Christian Schwedes, Mikhail N. Skvortsov, Joachim von Zanthier, and Herbert Walther "Indium single-ion optical frequency standard", Proc. SPIE 4269, Laser Frequency Stabilization, Standards, Measurement, and Applications, (3 May 2001); https://doi.org/10.1117/12.424471

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