A reliable cw Lyman-$\alpha$ laser source for future cooling of antihydrogen

D. Kolbe, A. Beczkowiak, T. Diehl +5

We demonstrate a reliable continuous-wave (cw) laser source at the 1\,$S$--2\,$P$ transition in (anti)hydrogen at 121.56\,nm (Lyman-$\alpha$) based on four-wave sum-frequency mixing in…