Entanglement and correlations of photons in bright squeezed vacuum light

Spatial and spectral features as well as strong photon correlations of non-classical multi-photon squeezed electromagnetic fields are discussed. We consider the theoretical approach based on the Schmidt mode analysis and able to describe analytically peculiarities of such bright squeezed light with high agreement with experimental data. Methods to control and manage the mode content, degree of squeezing and photon entanglement are analyzed. Their advantages and applied prospects are highlighted. Practical applications based on the non-classical features of squeezed fields for precise quantum measurements and strong coupling to atomic systems are discussed.