An experiment is presented which demonstrates 'amplification without inversion' (AWI) and 'inversion without amplification' of a picosecond pulse in a generalized lambda-type system. The phenomena are based on Zeeman coherence in the J=1-level of the ground state multiplet in samarium, induced by a picosecond pulse train. The experiment and its relation to other AWI proposals and to previous experiments in atomic spectroscopy are discussed in detail.
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Lange et al. (1994) studied this question.
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