Differential gain enhancement in a quantum dash laser using strong optical injection

L. F. Lester, F. Grillot, N. A. Naderi, V. Kovanis

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

2 Citations (Scopus)


Increased differential gain is typically realized through strain, quantum confinement, or p-type doping in the active region. These methods have been applied to quantum dots or dashes to raise the differential gain with limited success because the optical gain of these low dimensional systems saturates at modest values. Instead larger differential gain can be accessed at wavelengths blue-shifted from the gain peak and close to optical transparency using the threshold shift induced by optical injection. Using these approaches, greater than 50X improvement in the differential gain has been achieved in an injection-locked QDash FP laser compared to its free-running value.

Original languageEnglish
Title of host publicationPhysics and Simulation of Optoelectronic Devices XXI
Publication statusPublished - May 29 2013
Externally publishedYes
EventPhysics and Simulation of Optoelectronic Devices XXI - San Francisco, CA, United States
Duration: Feb 4 2013Feb 7 2013

Publication series

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


OtherPhysics and Simulation of Optoelectronic Devices XXI
CountryUnited States
CitySan Francisco, CA


  • Semiconductor lasers
  • differential gain
  • linewidth enhancement factor
  • optical injection
  • quantum dots

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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