Fig. 7 | Communications Physics

Fig. 7

From: Efficiently reconstructing compound objects by quantum imaging with higher-order correlation functions

Fig. 7

SPDC setup. A monochromatic laser is weakly focused into a PPKTP nonlinear crystal (NLC) to generate type-0 SPDC. The two-photon state is imaged via a 4-f arrangement from the center of the NLC to the object plane (OP) by using lenses L1 and L2. A long-pass filter (LF) blocks the pump and a band-pass filter (BF) transmits photons at 810 nm. A single-lens imaging system with lens L2 maps the OP onto the image plane (IP), which coincides with the fiber tip of two multimode fibers (MMFs) connecting the detection stages D1 and D2 in a coincidence circuit. The resolution of the imaging system is modified by a variable-size pinhole (PH)

Back to article page