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Operation of a cw Ar+-pumped rhodamine 6G laser tunable over 900 Å is reported using a thin flowing dye sheet in a new configuration. Passive mode-locked operation tunable over 400 Å has been obtained using an open flowing sheet of DODCI absorber. Multiple-pulse propagation in the laser cavity is observed with increasing pump power above threshold.
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Letouzey et al. (1973) studied this question.
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