Active mode locking generates coherent pulse trains in semiconductor lasers, highlighting adjustable frequency comb capabilities.
Inducing a spatiotemporal gain/loss modulation along the entire semiconductor laser waveguide results in an intracavity pulse pulling effect, generating coherent pulse trains and frequency combs with a continuously tunable repetition rate between 4-16 GHz.
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Senica et al. (2025) studied this question.
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