The second-order interference between laser and thermal light

Anticorrelation is observed when laser and pseudothermal light beams are incident to the two input ports of a Hong-Ou-Mandel interferometer, respectively. The spatial second-order interference pattern of laser and pseudothermal light beams is reported. A temporal Hong-Ou-Mandel dip is observed when these two detectors are in symmetrical positions. The experimental results can be interpreted by the two-photon interference theory.