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An antireflection-coated angled-stripe two-section C3laser has been mode-locked in an external cavity by application of sinusoidal modulation at the cavity round-trip frequency to the section providing gain while the other section provides saturable loss. Pulses less than 20 ps in duration with low noise and background intensity are obtained subject to the relaxed operational tolerances characteristic of hybrid mode-locking.
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Phelan et al. (1986) studied this question.
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