The ion microwave frequency standard is a candidate for the next generation of with potential very wide applications. Dick effect and second-order Doppler shift (SODFS) limit performance standards. introduction sympathetic cooling technology can suppress SODFS improve stability accuracy standard. However, sympathetically cooled has seldom been studied before. This paper reports high-performance...

Abstract We present the results of 10 years research related to development a Rubidium vapor cell clock based on principle pulsed optical pumping (POP). Since in approach, operation phases take place at different times, this technique demonstrated be very effective curing several issues affecting traditional Rb clocks working continuous regime, like light shift, with consequent improvement freq...