Mid-infrared Spectrally Pure Single-Photon States Generation from 22 Nonlinear Optical Crystals

Figure 2

The result of all the BPM crystals for three kinds of GVM conditions. can achieve a purity of 0.97. can achieve a purity of 0.82. The GVM angle increases from 0^° to 45^° and ends up at 90^° on the left axis for condition. The condition (red points) can cover the wavelength range from 1298 nm to 7384 nm. The condition (magenta points) can cover the wavelength range from 2312 nm to 11650 nm. The condition (green points) can cover the wavelength range from 1658 nm to 9380 nm.