Abstract
We report inversion and lasing on the optically pumped resonance line of Sr+. A mode-locked frequency-doubled dye laser was tuned to excite the dipole-allowed two-electron transition, 5S(2) (1)S(0)-4d5p (3)P1(0), in Sr vapor. The same laser then ionized the excited atoms, selectively producing ions in the Sr+ 5p (2)p(3/2)(0) excited level. The inversion density with respect to the Sr+ ground level was approximately 10(13) cm(-3).
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