This paper provides a theoretical background for the simulations of particular quantum optics
experiments, namely, photon intensity correlation measurements. A practical example, adapted to
polarisation-entangled photon pairs emitted from a quantum dot, is presented. The tool, a virtual
Hanbury Brown and Twiss correlator, simulates polarisation-resolved the second-order correlation
functions, which then can be used in a photonic state tomography procedure—a full description of a
light source’s polarisation state. This educational tool is meant to improve general understanding
of such quantum optics experiments.