Theory of intracavity nonlinear processes in quantum cascade lasers

Alexey Belyanin, Debin Liu, Feng Xie, Federico Capasso, Claire F. Gmachl

Research output: Contribution to journalConference articlepeer-review

1 Scopus citations


We overview coherent nonlinear optical phenomena that occur in active quantum-cascade structures which support both laser action and, at the same time, nonlinear self-conversion of laser light into coherent radiation at different frequencies. In other words, the laser field serves as an intracavity optical pump for the desired nonlinear optical process. In such systems, resonant absorption of the pump field is overcome by laser gain, and huge resonant nonlinearities of the intersubband transitions can be fully exploited. The proposed approach holds promise to extend the operating wavelength of QC lasers to the spectral regions where they become less efficient, constrained by material limitations, or operate only at cryogenic temperatures. It may also lead to the development of broadly tunable injection-pumped sources.

Original languageEnglish (US)
Article number15
Pages (from-to)98-108
Number of pages11
JournalProgress in Biomedical Optics and Imaging - Proceedings of SPIE
StatePublished - 2005
EventNovel In-Plane Semiconductor Lasers IV - San Jose, CA, United States
Duration: Jan 24 2005Jan 27 2005

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Atomic and Molecular Physics, and Optics
  • Radiology Nuclear Medicine and imaging
  • Biomaterials


  • Lasing without inversion
  • Nonlinear optics
  • Quantum cascade laser
  • Raman laser
  • Second-harmonic generation


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