The NAC - a miniature CPT Rubidium clock

Here we report of the design and characterization of a miniaturized Rubidium Frequency Standard named NAC1 (Nano Atomic Clock 1), now commercially available. Recently, the introduction of the effect of coherent population trapping (CPT) has led to a substantial reduction in power and size of commercial atomic frequency standards. Here, utilizing this effect in a traditional glass technology, we are able to introduce a compact and low power frequency standard.