Figure 12 with Caption

Fig. 12 Schematic diagram of the Hanbury-Brown Twiss experiment demonstrating coherent interference in light from incoherent sources. Sources 1 and 2 are separate by distance d12, and emit photons of identical wavelengths which are detected b y detectors A and B located a distance dAB apart. The distance between source plane and detector plane is L. A product or coincidence between detector outputs results in a composite signal exhibiting an interference effect depending on both d12 and dAB.< p>