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A synchronously pumped cavity-dumped mode-locked cw dye laser using a ring cavity configuration is reported. High intracavity intensities and reliable mode locking are achieved when the ring laser is operated in a unidirectional traveling-wave mode using an intracavity Faraday rotator. The experiment points up the importance of increaseing the asymmetry in the gain or loss between the two possible counterpropagating intracavity pulses in achieving good mode locking.
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Blit et al. (1980) studied this question.
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