Review of high power frequency comb sources based on InP: From MIR to THz at CQD

Manijeh Razeghi, Quanyong Lu, Donghai Wu, Steven Boyd Slivken

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

4 Scopus citations


We present the recent development of high performance compact frequency comb sources based on mid-infrared quantum cascade lasers. Significant performance improvements of our frequency combs with respect to the continuous wave power output, spectral bandwidth, and beatnote linewidth are achieved by systematic optimization of the device's active region, group velocity dispersion, and waveguide design. To date, we have demonstrated the most efficient, high power frequency comb operation from a free-running room temperature continuous wave (RT CW) dispersion engineered QCL atλ ∼5-9μm. In terms of bandwidth, the comb covered a broad spectral range of 120 cm -1 with a radio-frequency intermode beatnote spectral linewidth of 40 Hz and a total power output of 880 mW at 8 μm and 1 W at λ∼5.0μm. The developing characteristics show the potential for fast detection of various gas molecules. Furthermore, THz comb sources based on difference frequency generation in a mid-IR QCL combs could be potentially developed.

Original languageEnglish (US)
Title of host publicationTerahertz Emitters, Receivers, and Applications IX
EditorsAlexei N. Baranov, Manijeh Razeghi
ISBN (Electronic)9781510620834
StatePublished - 2018
EventTerahertz Emitters, Receivers, and Applications IX 2018 - San Diego, United States
Duration: Aug 19 2018Aug 20 2018

Publication series

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


ConferenceTerahertz Emitters, Receivers, and Applications IX 2018
Country/TerritoryUnited States
CitySan Diego


  • four-wave mixing
  • frequency comb
  • group velocity dispersion
  • quantum cascade lasers

ASJC Scopus subject areas

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


Dive into the research topics of 'Review of high power frequency comb sources based on InP: From MIR to THz at CQD'. Together they form a unique fingerprint.

Cite this