铌酸锂（ＬiＮbO3）晶体具有优良的压电、电光、声光、非线性等性能。在军事、民用领域有着广泛的用途，随着光电技术的发展，ＬＮ晶体在国防技术中的应用越来越受到重视。ＬＮ晶体是一种重要的多功能晶体，它具有非线性光学性质，其非线性光学系数较大；而且能够实现非临界相位匹配，掺Mg：ＬＮ晶体，抗激光损伤能力大大提高，促进了ＬＮ晶体在非线性光学领域中的应用；Nd：Mg：ＬＮ晶体，可实现自倍频效应；掺Fe：ＬＮ晶体现在大量用在光学体全息存储；ＬＮ还是非常好的电光晶体，现在成为重要的光波导材料；ＬＮ晶体还是较好的压电晶体，能用于制作中低频SAW滤波器，大功率耐高温的超声换能器等。

Crystal Structure	Trigonal, point group 3m
Lattice Parameters	a=5.148Å, c=13.863Å
Density	4.64 g/cm3
Melting Point	1250 °C
Curie Point	1142±2℃
Mohs Hardness	5
Dielectric Constant	e11/e0 = 85; e33/e0 = 29.5
Thermal Conductivity	38 W/m/°C at 25°C
Thermal Expansion Coefficient	a1=a2 =2x10-6/°C, a3=2.2x10-6/ °C at 25°C
Piezoelectric Strain Constant	d22 = 2.04 x 10-11 C/N, d33 = 19.22 x 10-11 C/N
Elastic Stiffness Constant	CE11 = 2.04 x 1011 N/m2, CE33 = 2.46 x 1011 N/m2

Optical and NLO Properties

Transparency Region	3700 ~ 5000 nm
Sellmeier Equations (l in mm)	no2 = 4.9048+0.11768/(l2-0.0475)-0.027169l2 ne2 = 4.5820+0.099169/(l2-0.04443)-0.02195l2
Optical Homogeneity	Dn ~ 5x105/cm2
Nonlinear Coefficients	deff=13.6 d36(KDP) for OPO at 1064 nm deff =14.6 d36(KDP) for SHG at 1300 nm deff =45.0 d36(KDP) for QPM
Refractive Indexes	no       ne   2.220    2.146  @ 1300 nm 2.232    2.156  @ 1064 nm 2.286    2.203  @ 632.8 nm
Electro-optic Coefficients (pm/V)	Low frequency        High frequency g33      32                    31 g31      10                    8.6 g22      6.8                   3.4
Damage Threshold	> 250 KW/cm2 at 1064 nm (10 ns)