New Microwave Power Control Technique By Light Shift Detection In The DM-CPT Clock

Atomic clocks based on coherent population trapping (CPT) and constructive polarization modulation are promising for high performance and compact devices. We propose a new method to act on the power repartition between the two laser frequency sidebands via the microwave power. We show an improvement of the frequency stability by a factor 10 after 1000 s integration time. Now we are mainly limited by the temperature variations of the polarization modulator.