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We investigate the process of entangled state of light generation whilepropagation along a one dimensional array of single-mode nonlinear waveguides.We consider a situation when entanglement is formed due to spontaneousparametric down-conversion of the pump which is present only in a signalwaveguide. In the considered process the generated state of light is multi-modesqueezed. We demonstrate that starting from certain distance of lightpropagation only pairs of waveguides, located symmetrically with respect to thepumped one, occur to be entangled. Also there is an optimal pump amplitude forwhich the formed quantum correlations are most pronounced. Entanglement formulti-mode squeezed states may be very sensitive for phase fluctuations in thepump. We investigate the influence of such noise on the discussed process. Wedemonstrate that for situation of generation of few photon entangled states theinfluence of phase fluctuations is negligible. But it dramatically increasewith the growth of average photon numbers in the formed quantum states.

Generation of gaussian entangled states of light in an array of nonlinear waveguides