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The pulsed rubidium clock.

Aldo Godone1, Salvatore Micalizio, Claudio E Calosso

  • 1Istituto Elettrotecnico Nazionale G. Ferraris, Strada delle Cacce 91, 10135 Torino, Italy.

IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control
|March 25, 2006
PubMed
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This study presents a laboratory prototype of a pulsed optically pumped clock using a rubidium vapor cell. The clock demonstrates excellent frequency stability, reaching 4 x 10(-14) at 3 x 10(14) s, ideal for satellite navigation.

Area of Science:

  • Atomic Physics
  • Metrology
  • Quantum Optics

Background:

  • Optically pumped atomic clocks offer high precision.
  • Rubidium vapor cells with buffer gas are a promising medium for frequency standards.
  • Existing frequency standards face limitations in stability and reliability for space applications.

Purpose of the Study:

  • To develop and characterize a laboratory prototype of a pulsed optically pumped clock.
  • To evaluate the frequency stability of a rubidium vapor cell-based clock.
  • To assess the suitability of this clock for satellite navigation and space missions.

Main Methods:

  • Utilizing a pulsed optically pumped clock architecture.
  • Employing a rubidium vapor cell with buffer gas as the active medium.

Related Experiment Videos

  • Measuring frequency stability using overlapping Allan deviation.

    • Main Results:

    • Achieved a frequency stability of sigma(y)(tau) = 3 x 10(-12)tau(-1/2).
    • Demonstrated a frequency stability level of 4 x 10(-14) at an averaging time of 3 x 10(14) s.
    • Experimental results align with theoretical predictions for this type of frequency standard.

    Conclusions:

    • The developed rubidium vapor cell clock prototype confirms theoretical predictions.
    • The clock exhibits high short and medium-term frequency stability, crucial for satellite navigation.
    • Its simple and reliable implementation makes it attractive for space applications.