New design strategies for multifunctional and inexpensive quantum cascade lasers

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


This manuscript describes some of the new advances in active mid-infrared photonic integrated circuits enabled by new quantum cascade laser technologies. This includes monolithic beam steering which was achieved via the integration of a widely tunable QCL and a tapered grating outcoupler. A record 17.9 degrees of steering with a low divergence beam (0.5 degrees) was achieved. In addition, the use of surface emitting architectures is proposed as a means to reduce the manufacturing cost of next-generation QCLs. A reflective outcoupler is demonstrated which can allow for stable surface emission from a quantum cascade laser and has potential for cost-effective wafer-scale manufacturing. This outcoupler is integrated with an amplified, electrically tunable laser architecture to demonstrate high power surface emission at a wavelength near 4.9 μm. Single mode peak power up to 6.7 W is demonstrated with >6 W available over a 90 cm-1 (215 nm) spectral range. All of this is achieved while maintaining a high quality output beam, similar to a standard edge emitter.

Original languageEnglish (US)
Title of host publicationQuantum Sensing and Nano Electronics and Photonics XVI
EditorsManijeh Razeghi, Jay S. Lewis, Eric Tournie, Giti A. Khodaparast
ISBN (Electronic)9781510624948
StatePublished - 2019
EventQuantum Sensing and Nano Electronics and Photonics XVI 2019 - San Francisco, United States
Duration: Feb 3 2019Feb 7 2019

Publication series

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


ConferenceQuantum Sensing and Nano Electronics and Photonics XVI 2019
Country/TerritoryUnited States
CitySan Francisco


  • Electronic beam steering
  • Photonic integrated circuit
  • Quantum cascade laser
  • Surface-emitting laser

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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