Stable unidirectional ring laser oscillation of optically pumped dimer molecules is reported. In the case of Na2, single-frequency output powers up to 200 mW tunable over a range of 4 GHz were obtained. By means of oscillator amplifier systems the forward-backward amplification profiles and the level splitting due to the dynamic Stark effect were measured.
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Wellegehausen et al. (1979) studied this question.
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