Abstract
We report the recent progress of our pulsed optically pumped (POP)
vapor cell rubidium clock with dispersive detection. A new compact physics
package is made. A rubidium cell with a high precision buffer gases mixing
ratio is obtained, and the temperature controlling system is renovated to
reduce fractional frequency sensitivity to temperature variation. The
resolution of the servo control voltage is also optimized. With these
improvements, a clock frequency stability of 3.53×10−13 at 1 s is
obtained, and a fractional frequency stability of 4.91×10−15 is
achieved at an average time of τ=2000 s.
© 2017 Chinese Laser Press
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