Author Affiliations

Daniel Lesko,^1,2,* Henry Timmers,¹ Sida Xing,¹ Abijith Kowligy,¹ Alexander Lind,^1,3 Kevin Zawilski,⁴ Peter Schunemann,⁴ and Scott Diddams^1,3

¹Time and Frequency Division, National Institute of Standards and Technology, 325 Broadway, Boulder Colorado 80305, USA

²Department of Chemistry, University of Colorado, 215 UCB, Boulder Colorado 80309, USA

³Department of Physics, University of Colorado, 2000 Colorado Ave., Boulder Colorado 80309, USA

⁴BAE Systems, PO. Box 868 Nashua, New Hampshire 03063, USA

^*Corresponding author: Daniel.Lesko@nist.gov