Influence of non-radiative carrier losses on pulsed and continuous VECSEL performance

Alexandre Laurain, Jorg Hader, Yi Ying Lai, Tsuei Lian Wang, Mike Yarborough, Ganesh Balakrishnan, Thomas J. Rotter, Pankaj Ahirwar, Jerome V. Moloney

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

9 Scopus citations


We investigate experimentally and theoretically the influence of non-radiative carrier losses on the performance of VECSELs under pulsed and CW pumping conditions. These losses are detrimental to the VECSEL performance not only because they reduce the pump-power to output-power conversion efficiency and lead to increased thresholds, but also because they are strong sources of heat. This heating reduces the achievable output power and eventually leads to shut-off due to thermal roll-over. We investigate the two main sources of non-radiative losses, defect recombination and Auger losses in InGaAs-based VECSELs for the 1010nm-1040nm range as well as for InGaSb-based devices for operation around 2μm. While defect related losses are found to be rather insignificant in InGaAs-based devices, they can be severe enough to prevent CW operation for the InGaSb-based structures. Auger losses are shown to be very significant for both wavelengths regimes and it is discussed how structural modifications can suppress them. For pulsed operation record output powers are demonstrated and the influence of the pulse duration and shape is studied.

Original languageEnglish (US)
Title of host publicationVertical External Cavity Surface Emitting Lasers (VECSELs) II
StatePublished - 2012
EventVertical External Cavity Surface Emitting Lasers (VECSELs) II - San Francisco, CA, United States
Duration: Jan 23 2012Jan 24 2012

Publication series

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


OtherVertical External Cavity Surface Emitting Lasers (VECSELs) II
Country/TerritoryUnited States
CitySan Francisco, CA


  • Auger
  • Carriers losses
  • Defect recombination
  • MIR
  • OPSL
  • Semiconductor

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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