Relaxation oscillations in long-pulsed random lasers

K.L. van der Molen, Allard Mosk, Aart Lagendijk

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We have measured the evolution of the intensity emitted by a random laser during a pump pulse that is comparable in duration to the spontaneous emission decay time. The time traces of our random laser, consisting of titanium dioxide particles and sulforhodamine B dye, show clear relaxation oscillations. We compare our experimental results to an analytic, conventional model based on the four-level rate equations for a single-mode laser. The measured frequency of well-resolved fluctuation oscillations suggests an effective mode lifetime of 5 ps.
Original languageUndefined
Pages (from-to)1-4
Number of pages4
JournalPhysical review A: Atomic, molecular, and optical physics
Issue number055803
Publication statusPublished - 2009


  • IR-73209
  • METIS-261273

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