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Quantum Electronics

Statistics of the polarisation states of a quasi-isotropic dye laser

Sergey V. Sergeyev, И. Н. Козлов

Published Nov 30, 1999• 0 citations
Publisher

Abstract

The equilibrium distribution function of the intensities of two polarisation modes was obtained theoretically. This function is consistent with experimental results for a dye laser with transverse pumping polarised along the cavity axis.
DOI
10.1070/qe1999v029n11abeh001612

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The probability distribution p(n)p(n)p(n) for the detection of nnn photons emitted by a single-mode dye laser in a short time at various excitations is measured, together with the distribution of time intervals between pairs of detected photons. The first measurement yields the probability density p(I)\mathcal{p}(I)p(I) and the moments of the light intensity III, and the second one the two-time intensity-correlation function. Measurements are also performed at three different wavelengths. p(I)\mathcal{p}(I)p(I) is found to have a two-component structure, and the relative intensity fluctuations $\frac{〈{(\ensuremath{\Delta}I)}^{2}〉}{{〈I〉}^{2}}$ grow, apparently without limit, as the excitation tends to zero, so that no thermal state is reached. A possible explanation in terms of pumping fluctuations is discussed. The correlation function has the form of a sum of three exponential functions, and the amplitudes and decay constants of the three components are derived. The effective decay-time constant exhibits a thirteenth-power-law dependence on frequency of the laser light.