Relaxation oscillations in long-pulsed random lasers

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

doi:10.1103/PhysRevA.80.055803

Relaxation oscillations in long-pulsed random lasers

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

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Abstract

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 language	Undefined
Pages (from-to)	1-4
Number of pages	4
Journal	Physical review A: Atomic, molecular, and optical physics
Volume	80
Issue number	055803
DOIs	https://doi.org/10.1103/PhysRevA.80.055803
Publication status	Published - 2009

Keywords

IR-73209
METIS-261273

Access to Document

10.1103/PhysRevA.80.055803

Cite this

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AU - van der Molen, K.L.

AU - Mosk, Allard

AU - Lagendijk, Aart

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N2 - 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.

AB - 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.

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KW - METIS-261273

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DO - 10.1103/PhysRevA.80.055803

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JO - Physical review A: Atomic, molecular, and optical physics

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