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Phase-resolved measurements of stimulated emission in a laser

Author

Listed:
  • Josef Kröll

    (Photonics Institute, Vienna University of Technology, Gusshausstrasse 25-29, A-1040 Vienna, Austria)

  • Juraj Darmo

    (Photonics Institute, Vienna University of Technology, Gusshausstrasse 25-29, A-1040 Vienna, Austria)

  • Sukhdeep S. Dhillon

    (Matériaux et Phénomènes Quantiques, Université Paris 7
    Ecole Normale Superieure)

  • Xavier Marcadet

    (Alcatel-Thales III-V Lab, 91767 Palaiseau Cedex, France)

  • Michel Calligaro

    (Alcatel-Thales III-V Lab, 91767 Palaiseau Cedex, France)

  • Carlo Sirtori

    (Matériaux et Phénomènes Quantiques, Université Paris 7)

  • Karl Unterrainer

    (Photonics Institute, Vienna University of Technology, Gusshausstrasse 25-29, A-1040 Vienna, Austria)

Abstract

A measured approach Laser radiation is usually measured with detectors that determine frequency and intensity, but gather no information about the phase of the radiation. By measuring the phase it would become possible to gain insights in the dynamic processes of optical amplification and attenuation underlying laser operation. Kröll et al. have now developed a way of measuring amplitude as well as phase of laser radiation from so-called quantum cascade lasers, which operate in the terahertz regime. The technique, which could be extended to other types of lasers, can be used to study effects leading to optical losses — useful information to improve the laser performance.

Suggested Citation

  • Josef Kröll & Juraj Darmo & Sukhdeep S. Dhillon & Xavier Marcadet & Michel Calligaro & Carlo Sirtori & Karl Unterrainer, 2007. "Phase-resolved measurements of stimulated emission in a laser," Nature, Nature, vol. 449(7163), pages 698-701, October.
    • Handle: RePEc:nat:nature:v:449:y:2007:i:7163:d:10.1038_nature06208
    DOI: 10.1038/nature06208
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