Generation and spectroscopic characterization of continuous-wave 148.4-nm light in strontium tetraborate

Ming Guan, Yang Wang, Heng Tu +12

Continuous-wave (CW) radiation at 148.4~nm is required to drive the ${}^{229}$Th isomeric transition of a solid-state nuclear clock, and frequency doubling of 296.8-nm light is its m…