Analysis of hybrid mode-locking of two-section quantum dot lasers operating at 15 μm
OPTICS EXPRESS(2009)
摘要
For the first time a detailed study of hybrid mode-locking in two-section InAs/InP quantum dot Fabry-Perot-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. (C) 2009 Optical Society of America
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