Multimode instabilities in mid-infrared quantum cascade lasers


  • Maciej Bugajski Institute of Electron Technology
  • Kamil Pierściński Institute of Electron Technology
  • Dorota Pierscinska Institute of Electron Technology
  • Anna Szerling Institute of Electron Technology
  • Kamil Kosiel Institute of Electron Technology



We present experimental evidence for mid-infrared frequency comb based on AlGaAs/GaAs quantum cascade laser. The comb-like emission spectra span over ~50 cm-1 at a center wavenumber ~1080 cm-1. The measured width of the comb lines is < 20 MHz. The instability sets in when the intracavity power is sufficiently large. In addition, intersubband transitions feature strong third-order optical nonlinearities chi(3), due to the large matrix element between the upper and lower laser states, allowing parametric process due to four-wave mixing. The observed spectral behavior is similar in many ways to the Risken-Nummedal-Graham-Haken (RNGH) instability.

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Author Biography

Maciej Bugajski, Institute of Electron Technology

Department of Physics and Technology of Low Dimensional Structures

Professor, Head of Department




How to Cite

M. Bugajski, K. Pierściński, D. Pierscinska, A. Szerling, and K. Kosiel, “Multimode instabilities in mid-infrared quantum cascade lasers”, Photonics Lett. Pol., vol. 5, no. 3, pp. pp. 85–87, Sep. 2013.