Measurement of the $4S_{1/2}\to 6S_{1/2}$ transition frequency in atomic potassium via direct frequency comb spectroscopy

J. E. Stalnaker, H. M. G. Ayer, J. H. Baron +2

We present an experimental determination of the $4S_{1/2}\to 6S_{1/2}$ transition frequency in atomic potassium, ${}^{39}$K, using direct frequency comb spectroscopy.…