Dual section quantum cascade lasers with wide electrical tuning

S. Slivken*, N. Bandyopadhyay, S. Tsao, S. Nida, Y. Bai, Q. Y. Lu, M. Razeghi

*Corresponding author for this work

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

6 Scopus citations


This paper describes our development efforts at Northwestern University regarding dual-section sampled grating distributed feedback (SGDFB) QCLs. These devices are the same size, but have much wider electrical tuning, than a traditional DFB laser. In this paper, I will show how we have dramatically extended the monolithic tuning range of high power quantum cascade lasers with high side mode suppression. This includes individual laser element tuning of up to 50 cm -1 and 24 dB average side mode suppression. These lasers are capable of room temperature continuous operation with high power (<100 mW) output. Additionally, we have demonstrated a broad spectral coverage of over 350 cm -1 on a single chip, which is equivalent to 87.5% of the gain bandwidth. The eventual goal is to realize an extended array of such laser modules in order to continuously cover a similar or broader spectral range, similar to an external cavity device without any external components.

Original languageEnglish (US)
Title of host publicationQuantum Sensing and Nanophotonic Devices X
StatePublished - 2013
EventQuantum Sensing and Nanophotonic Devices X - San Francisco, CA, United States
Duration: Feb 3 2013Feb 7 2013

Publication series

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


OtherQuantum Sensing and Nanophotonic Devices X
Country/TerritoryUnited States
CitySan Francisco, CA


  • high power
  • monolithic integration
  • quantum cascade laser
  • tunable

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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