Modeling of ultrashort pulse generation in mode-locked VECSELs

Research output: Chapter in Book/Report/Conference proceedingConference contribution

2 Scopus citations


We present a study of various models for the mode-locked pulse dynamics in a vertical external-cavity surface emitting laser with a saturable absorber. The semiconductor Bloch equations are used to model microscopically the light-matter interaction and the carrier dynamics. Maxwell's equations describe the pulse propagation. Scattering contributions due to higher order correlation effects are approximated using effective rates that are found from a comparison to solving the microscopic scattering equations on the second Born-Markov level. It is shown that the simulations result in the same mode-locked final state whether the system is initialized with a test pulse close to the final mode-locked pulse or the full field build-up from statistical noise is considered. The influence of the cavity design is studied. The longest pulses are found for a standard V-cavity while a linear cavity and a V-cavity with an high reflectivity mirror in the middle are shown to produce similar, much shorter pulses.

Original languageEnglish (US)
Title of host publicationPhysics and Simulation of Optoelectronic Devices XXIV
EditorsYasuhiko Arakawa, Bernd Witzigmann, Marek Osinski
ISBN (Electronic)9781628419771
StatePublished - 2016
EventPhysics and Simulation of Optoelectronic Devices XXIV - San Francisco, United States
Duration: Feb 15 2016Feb 18 2016

Publication series

NameProceedings of SPIE - The International Society for Optical Engineering
ISSN (Print)0277-786X
ISSN (Electronic)1996-756X


OtherPhysics and Simulation of Optoelectronic Devices XXIV
Country/TerritoryUnited States
CitySan Francisco


  • GaAs
  • Mode-Locking
  • RPG
  • Semiconductor Bloch Equations
  • Semiconductor Laser
  • Simulation

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Computer Science Applications
  • Applied Mathematics
  • Electrical and Electronic Engineering


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