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Continuous-wave 148.4-nm generation in strontium tetraborate for nuclear absorption spectroscopy

Wang, Hanlin et al.
arXiv (All) · Papers
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optics
Continuous-wave light near 148.4 nm enables direct absorption spectroscopy of the thorium-229 nuclear transition. We demonstrate single-pass frequency doubling in strontium tetraborate, delivering an estimated 8.1 nW at 920 mW pump power. At this power, oxygen admission leaves a background of 1.22 k
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