Second-order classical 2D ghost imaging with near-infrared light

Second-order 2D ghost imaging using near-infrared light is investigated theoretically and experimentally. The far-field analytical results of this imaging technology realized with a uniformly bright, incoherent and quasi-monochromatic light source are deduced and the numerical simulations are performed using pinhole as the imaging object. Simulation results show that the second-order intensity correlation can reproduce the object exactly. A second-order ghost imaging experiment by using erbium-doped fiber amplifier as its light source is carried out to accurately image a 300 μm pinhole. The results of the numerical simulations based on the classical wave theory agree well with the experimental results.