Frequency instability investigations on a Cs cell clock based on pulsed coherent population trapping

Recent progress are reported on a compact cesium cell atomic frequency standard based on pulsed coherent population trapping. The Dick effect has been modelized and measured. The short term frequency stability has been improved to 3.2×10
⁻¹³
τ
^−1/2
. Important steps have been taken toward the understanding of the impact of laser power fluctuations on the mid-term stability, currently limited at 3.10
⁻¹⁴
at 200s.