Theoretical and Experimental Study of Light Shift in a CPT-Based RB Vapor Cell Frequency Standard

Abstract

One of the important subjects in coherent-population- trapping-based (CPT-based) vapor cell frequency standards is the light shift (ac Stark shift). We calculate the light shift using a numerical method and perturbation approximation. Experimentally, we measure light shift using a pair of phase-locked diode lasers as well as a frequency-modulated diode laser. There is good agreement between theory and experiment. A method of controlling light shift in CPT-based frequency standards is proposed and implemented in Agilent Laboratories. The short-term stability of our CPT-based rubidium vapor cell frequency standard is measured as 1.3 x 10(-12) tau (-1/2), which is limited by the phase noise of the reference local oscillator used.

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Document Details

Document Type
Technical Report
Publication Date
Jan 01, 2001
Accession Number
ADA485242

Entities

People

  • L. S. Cutler
  • Menglin Zhu

Tags

Communities of Interest

  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Amplitude Modulation
  • Atomic Energy Levels
  • Atoms
  • Dipole Moments
  • Energy Levels
  • Frequency
  • Frequency Modulation
  • Frequency Standards
  • Ground State
  • Intensity
  • Laser Beams
  • Laser Diodes
  • Laser Spectroscopy
  • Lasers
  • Modulation
  • Optical Lattices
  • Standards

Fields of Study

  • Physics

Readers

  • Positioning, Navigation, and Timing (PNT) Technology.
  • Quantum Dot Semiconductor Device Photonics and Graphene Optoelectronic Materials and THz Physics.

Technology Areas

  • Directed Energy
  • Directed Energy - Lasers