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

Table 4

Three kinds of GVM conditions for 8 QPM crystals. is the GVM wavelength for the pump (signal, idler). is the poling period, and is the effective nonlinear coefficient. The Sellmeier equations are obtained from refs. [34, 35]. Most of the values can be obtained from the SNLO software package, developed by AS-Photonics, LLC [57]. The values for and are not available from SNLO, so we have calculated them using the method in the appendix of ref. [52] and considering Miller’s rule [58]. The value for PMN-0.38PT is unknown.

Name	(purity0.97)	(purity0.97)	(purity0.82)
LT	= 1279 nm,  = 2558 nm	= 1320 nm,  = 2640 nm	= 1299 nm,  = 2598 nm
	= 33.7 m,  = 0.27 pm/V	= 33.7 m,  = 0.27 pm/V	= 33.7 m,  = 0.27 pm/V
LN	= 1341 nm,  = 2682 nm	= 2015 nm,  = 4030 nm	= 1709 nm,  = 3418 nm
	= 14.7 m,  = 2.70 pm/V	= 15.2 m,  = 2.50 pm/V	= 15.5 m,  = 2.60 pm/V
KTP	= 613 nm,  = 1224 nm	= 1169 nm,  = 2338 nm	= 792 nm,  = 1584 nm
	= 70.2 m,  = 2.50 pm/V	= 72.2 m,  = 2.40 pm/V	= 45.0 m,  = 2.40 pm/V
KN	= 1412 nm,  = 2824 nm	= 1869 nm,  = 3738 nm	= 1605 nm,  = 3210 nm
	= 6.2 m,  = 5.20 pm/V	= 6.1 m,  = 5.00 pm/V	= 6.3 m,  = 5.10 pm/V
	= 1518 nm,  = 3036 nm	= 1993 nm,  = 3986 nm	= 1740 nm,  = 3480 nm
	= 23.3 m,  = 10.13 pm/V	= 23.3 m,  = 9.17 pm/V	= 23.8 m,  = 9.69 pm/V
	= 989 nm,  = 1978 nm	Not satisfied	= 1390 nm,  = 2780 nm
	= 948.5 m,  = 0.04 pm/V		= 680.6 m,  = 0.04 pm/V
PMN-	= 2810 nm,  = 5620 nm	Not satisfied	= 3972 nm,  = 7944 nm
	= 1301.38 m,  = unknown		= 917.83 m,  = unknown
OP-ZnSe		= 3403 nm,  = 6806 nm
		= 262.97 m,  = 19.1 pm/V