Mode Repulsion and Mode Coupling in Random Lasers

Details Mode Repulsion and Mode Coupling in Random Lasers Mode Repulsion and Mode Coupling in Random Lasers

2003-01-23

arxiv.org/abs/cond-mat/0301461v1

Physics

Condensed Matter

Disordered Systems and Neural Networks

13 pages, 4 figures

Scientific paper

10.1103/PhysRevB.67.161101

We studied experimentally and theoretically the interaction of lasing modes in random media. In a homogeneously broadened gain medium, cross gain saturation leads to spatial repulsion of lasing modes. In an inhomogeneously broadened gain medium, mode repulsion occurs in the spectral domain. Some lasing modes are coupled through photon hopping or electron absorption and reemission. Under pulsed pumping, weak coupling of two modes leads to synchronization of their lasing action. Strong coupling of two lasing modes results in anti-phased oscillations of their intensities.

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