Patterns in nonlinear optics in presence of (quantum) noise

Summary form only given. We report our recent results on the pattern formation in nonlinear optical systems in presence of additive (quantum) noise. We show: (1) that the patterns progressively emerge from noise by approaching the pattern formation threshold from below; (2) that the patterns show Bose-Einstein-like distributions of the far field above the pattern forming threshold. (3) that the temporal power spectra of optical patterns is of 1/f/sup a/ form in the presence of the additive noise.