Optical emulation of photon-pair generation in nonlinear lossy waveguides Markus Gräfe, Diana A. Antonosyan, Alexander S. Solntsev, Andrey A. Sukhorukov and Alexander Szameit EPL, 118 5 (2017) 54001 Published online: 07 August 2017 DOI: 10.1209/0295-5075/118/54001