Very interesting! Two-photon pumping of traditional lasers with only 2 states would require absurd energy densities, but I guess the combination of a strong qua

Very interesting! Two-photon pumping of traditional lasers with only 2 states would require absurd energy densities, but I guess the combination of a strong quadrupole coupling and long state decay times makes it feasible for a nuclear laser. Still not clear what it would be useful for outside of clocks, but definitely a very cool physics project, and I'm sure someone would find other uses eventually.