Abstract
Random fluctuations in near field intensity emitted by a dye laser have been observed. These fluctuations appear only if a small area (≲ 100 μm diameter) is selected from the cross section of the field. It has been concluded that this is a pure quantum effect related to laser field formation processes starting from spontaneous emission. Its local being is explained by the break in transversal coherence produced by thermal inhomogeneities induced by the pumping and the laser field itself.
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