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. 2019 Jul 18;9:10445. doi: 10.1038/s41598-019-46273-x

Figure 1.

Figure 1

Schematics of the experimental setup. A 355 nm laser pumps a BBO crystal to produce collinear downconverted photon pairs at 710 nm. The signal and idler photons (respectively represented in plain and dashed lines) are separated using a beam splitter. The far-field of the crystal is imaged onto the object and the ICCD camera in the other arm. The image plane of the crystal is imaged in the fiber plane in the idler arm. The relative displacement of the fiber within the the idler beam is produced by an SLM placed in the Far-Field of the crystal in the heralding arm. The ICCD camera is then triggered by the SPAD to obtain HI coherent images. An image-preserving delay line is introduced to compensate for the electronic delays in triggering the camera (delay line shown within the rectangle on the right part of the setup). An aperture can be introduced at the object focal plane of the last lens in front of the camera to fix the numerical aperture of the imaging system.