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We show that the generators of quantum states of light can be built byemploying the Kerr nonlinearity, a strong linear absorption or losses and thelinear coupling of optical modes. Our setup can be realized, for instance, withthe use of the optical fiber technology. We consider in detail the simplestcases of three and four coupled modes, where a strongly lossy mode is linearlycoupled to other linear and nonlinear modes. In the three-mode design, ourscheme emulates the third-order nonlinear absorption, allowing for generationof the single photon states, or the two-photon absorption allowing to generatethe phase states. In the four-mode design, the scheme emulates a non-localabsorption which produces an entangled state of two uncoupled modes. We alsonote that in the latter case and in the case of the phase states generation theoutput state is in the linear modes, which prevents its subsequent degradationby the strong losses accompanying the strong Kerr nonlinearity.

Generators of nonclassical states by combination of the linear coupling of boson modes, Kerr nonlinearity and the strong linear losses