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Opt Express. 2009 Sep 28;17(20):18063-75. doi: 10.1364/OE.17.018063.

Analysis of hybrid mode-locking of two-section quantum dot lasers operating at 1.5 microm.

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  • 1Laser Centre Vrije Universiteit, 1081 HV Amsterdam, The Netherlands.


For the first time a detailed study of hybrid mode-locking in two-section InAs/InP quantum dot Fabry-Pérot-type lasers is presented. The output pulses have a typical upchirp of approximately 8 ps/nm, leading to very elongated pulses. The mechanism leading to this typical pulse shape and the phase noise is investigated by detailed radio-frequency and optical spectral studies as well as time-domain studies. The pulse shaping mechanism in these lasers is found to be fundamentally different than the mechanism observed in conventional mode-locked laser diodes, based on quantum well gain or bulk material.

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