Study of coherent population trapping occurring in 87Rb atoms contained in wall-coated cells

We report on the continuous CPT-interrogation of ⁸⁷Rb atoms contained in a paraffin wall-coated cell. Based on the signal-to-noise measurements we predict a short-term stability better than 10^-12 tau^-1/2. This result confirms the interest on wall-coated cells for applications in high performance and compact vapor cell atomic clocks. We also report on our results on the influence of the cell temperature in the clock signal which has not be studied in this specific case as far as we know.