Hybrid-entangled biphotons: frequency mode analysis for the case of generation in optical fiber

We presented the results of a numerical analysis of frequency entanglement in the context of generating multidimensional polarization-entangled states of biphotons, proposed by the authors earlier. The results presented will be useful for researchers in the field of quantum optics to understand the internal structure of entanglement of hybrid two-photon states of light and the possibility of controlling these states.