Correlation of mid-infrared quantum-cascade laser performance with laser design parameters

R. P. Leavitt, J. L. Bradshaw, K. M. Lascola, F. J. Towner, J. T. Pham, J. D. Bruno, Claire F. Gmachl, P. Q. Liu

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


Several different quantum-cascade (QC) laser designs spanning the wavelength range between ~3.8 and ~4.8 microns were grown, and devices were fabricated and tested. The active regions of these designs consist of strained layers of (In,Ga)As and (In,Al)As. For several of these designs, we varied design parameters including injector doping, sectioncoupling strength, and the number of QC laser periods. Lasers were tested near room temperature under both quasi-cw and low-duty-cycle conditions. Device performance is compared with theoretical expectations, and conclusions are reached on the relative merit of various design modifications.

Original languageEnglish (US)
Title of host publicationLaser Technology for Defense and Security VIII
StatePublished - 2012
EventLaser Technology for Defense and Security VIII - Baltimore, MD, United States
Duration: Apr 23 2012Apr 25 2012

Publication series

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


OtherLaser Technology for Defense and Security VIII
Country/TerritoryUnited States
CityBaltimore, MD

All Science Journal Classification (ASJC) codes

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


  • Chemical Sensing
  • Free-Space Communications
  • Infrared Countermeasures
  • Mid-IR Lasers
  • Quantum Cascade Lasers
  • Semiconductor Lasers


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