Pulse dynamics in SESAM-free electrically pumped VECSEL

Nikolai B. Chichkov, Amit Yadav, Anton V. Kovalev, Semyon V. Smirnov, Markus Herper, Ksenia A. Fedorova, Evgeny A. Viktorov, Edik U. Rafailov

Research output: Contribution to journalArticlepeer-review


Self-starting pulsed operation in an electrically pumped (EP) vertical-external-cavity
surface-emitting-laser (VECSEL) without intracavity saturable absorber is demonstrated. A
linear hemispherical cavity design, consisting of the EP-VECSEL chip and a 10% output-coupler,
is used to obtain picosecond output pulses with energies of 2.8 pJ and pulse widths of 130 ps at a
repetition rate of 1.97 GHz. A complete experimental analysis of the generated output pulse
train and of the transition from continuous-wave to pulsed operation is presented. Numerical
simulations based on a delay-differential-equation (DDE) model of mode-locked semiconductor
lasers are used to reproduce the pulse dynamics and identify different laser operation regimes.
From this, the measured single pulse operation is attributed to FM-type mode-locking. The
pulse formation is explained by strong amplitude-phase coupling and spectral filtering inside the
Original languageEnglish
Article number13466
Pages (from-to)13466-13481
Number of pages16
JournalOptics Express
Issue number9
Publication statusPublished - 20 Apr 2020

Bibliographical note

Published by The Optical Society under the terms of the Creative Commons Attribution 4.0 License. Further distribution of this work must maintain attribution to the author(s) and the published article's title, journal citation, and DOI.
Funding: Engineering and Physical Sciences Research Council (EP/R024898/1); Alexander von HumboldtStiftung; H2020 Marie Skłodowska-Curie Actions (843801); Ministry of Education and Science
of the Russian Federation (Passport No. 2019-1442).


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