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}S₀–4d5p ³P₁⁰, in Sr vapor. The same laser then ionized the excited atoms, selectively producing ions in the Sr⁺ 5p ²P_3/2⁰ excited level. The inversion density with respect to the Sr⁺ ground level was approximately 10¹³ cm⁻³.

© 1978 Optical Society of America

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