Theoretical and experimental investigation of the light shift in Ramsey coherent population trapping

Yuichiro Yano, Wujie Gao, Shigeyoshi Goka, and Masatoshi Kajita
Phys. Rev. A 90, 013826 – Published 21 July 2014

Abstract

The ac Stark shift (or light shift) of the 62S1/2(F=34) transition in 133Cs, as observed through coherent population trapping under pulsed excitation, is measured using a 133Cs gas cell and the D1-line vertical-cavity surface-emitting laser. This light shift can be calculated using density-matrix analysis. We derive an expression for this shift as a function of light intensity, showing that it varies linearly with respect to light intensity only with intensities higher than 1.0 mW/cm2. For pulsed excitation of high laser intensity, the variation in light shift is 20 times lower than that when using a continuous wave. The differences between the results of theory and experiment are discussed, taking into account the difference in conditions assumed; the results from theoretical analysis, taking the attenuation of the first-order sideband into account, approximately agree with the experimental results. The light shift is reduced by shortening the observation times.

  • Figure
  • Figure
  • Figure
  • Figure
  • Figure
  • Figure
  • Figure
1 More
  • Received 16 December 2013
  • Revised 10 June 2014

DOI:https://doi.org/10.1103/PhysRevA.90.013826

©2014 American Physical Society

Authors & Affiliations

Yuichiro Yano*, Wujie Gao, and Shigeyoshi Goka

  • Graduate School of Science and Engineering, Tokyo Metropolitan University, Minami-Osawa, Hachioji, Tokyo 192-0397, Japan

Masatoshi Kajita

  • National Institute of Information and Communications Technology, Koganei, Tokyo 184-8795, Japan

  • *yano-yuichiro@ed.tmu.ac.jp

Article Text (Subscription Required)

Click to Expand

References (Subscription Required)

Click to Expand
Issue

Vol. 90, Iss. 1 — July 2014

Reuse & Permissions
Access Options
Author publication services for translation and copyediting assistance advertisement

Authorization Required


×
×

Images

×

Sign up to receive regular email alerts from Physical Review A

Log In

Cancel
×

Search


Article Lookup

Paste a citation or DOI

Enter a citation
×