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Phase seeding of a terahertz quantum cascade laser

Author

Listed:
  • Dimitri Oustinov

    (Laboratoire Pierre Aigrain, Ecole Normale Supérieure, CNRS (UMR 8551), Université P. et M. Curie, Université D. Diderot)

  • Nathan Jukam

    (Laboratoire Pierre Aigrain, Ecole Normale Supérieure, CNRS (UMR 8551), Université P. et M. Curie, Université D. Diderot)

  • Rakchanok Rungsawang

    (Laboratoire Pierre Aigrain, Ecole Normale Supérieure, CNRS (UMR 8551), Université P. et M. Curie, Université D. Diderot)

  • Julien Madéo

    (Laboratoire Pierre Aigrain, Ecole Normale Supérieure, CNRS (UMR 8551), Université P. et M. Curie, Université D. Diderot)

  • Stefano Barbieri

    (Matériaux et Phénomènes Quantiques, Université D. Diderot, Paris 7, 75251 Paris Cedex 05, France.)

  • Pascal Filloux

    (Matériaux et Phénomènes Quantiques, Université D. Diderot, Paris 7, 75251 Paris Cedex 05, France.)

  • Carlo Sirtori

    (Matériaux et Phénomènes Quantiques, Université D. Diderot, Paris 7, 75251 Paris Cedex 05, France.)

  • Xavier Marcadet

    (Alcatel-Thales 3-5 Lab)

  • Jérôme Tignon

    (Laboratoire Pierre Aigrain, Ecole Normale Supérieure, CNRS (UMR 8551), Université P. et M. Curie, Université D. Diderot)

  • Sukhdeep Dhillon

    (Laboratoire Pierre Aigrain, Ecole Normale Supérieure, CNRS (UMR 8551), Université P. et M. Curie, Université D. Diderot)

Abstract

The amplification of spontaneous emission is used to initiate laser action. As the phase of spontaneous emission is random, the phase of the coherent laser emission (the carrier phase) will also be random each time laser action begins. This prevents phase-resolved detection of the laser field. Here, we demonstrate how the carrier phase can be fixed in a semiconductor laser: a quantum cascade laser (QCL). This is performed by injection seeding a QCL with coherent terahertz pulses, which forces laser action to start on a fixed phase. This permits the emitted laser field to be synchronously sampled with a femtosecond laser beam, and measured in the time domain. We observe the phase-resolved buildup of the laser field, which can give insights into the laser dynamics. In addition, as the electric field oscillations are directly measured in the time domain, QCLs can now be used as sources for time-domain spectroscopy.

Suggested Citation

  • Dimitri Oustinov & Nathan Jukam & Rakchanok Rungsawang & Julien Madéo & Stefano Barbieri & Pascal Filloux & Carlo Sirtori & Xavier Marcadet & Jérôme Tignon & Sukhdeep Dhillon, 2010. "Phase seeding of a terahertz quantum cascade laser," Nature Communications, Nature, vol. 1(1), pages 1-6, December.
    • Handle: RePEc:nat:natcom:v:1:y:2010:i:1:d:10.1038_ncomms1068
    DOI: 10.1038/ncomms1068
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