Polarization-Angle SPDC Spectrum and its Effect on Generated Photon States A. Agapov, P. Gostev, S. Magnitskya, V. Firsov and D. Frolovtsev EPJ Web of Conferences, 103 (2015) 03004 Published online: 25 September 2015 DOI: 10.1051/epjconf/201510303004