LiNbO3 (LN) Crystals

LiNbO3 (LN) Crystals
LiNbO3 (LN) Crystals

LiNbO3 (Lithium niobate, LN) crystal is a negative uniaxial crystal and one of the most thoroughly characterized optical materials. With its wide transparency range in the visible and mid-infradred and the excellent chemical and mechanical stability, LN crystal can be used as a bifrengent material for applications in infrared.

Both pure LN and MgO doped LN (MgO:LN) are available from Newlight Photonics.

Please use "Add to Cart" to place the interesting products in the shopping cart. Check out with online payment or ask us for the prices/availability via the shopping cart. Filters below or the form at the bottom can be used to assist product search or make further inquiries.
Part No. Aperture Thickness Coating Price Availability Add to Cart


Basic Properties of pure LiNbO3:

Crystal Structure Trigonal, Space group R3C, Point group 3m
Cell Parameters a=5.148 Å , c=13.863 Å
Melting Point 1253oC
Curie Temperature 1140oC
Mohs Hardness 5
Density: 4.64 g/cm3
Deliquescence None
Optical Homogeneity ~ 5x10-5 /cm
Transparency Range 420 -- 5200 nm
Absorption Coefficient ~0.1%/cm @ 1064 nm
Refractive indices at 1064nm
(Pure LN)
ne= 2.146, no = 2.220 @ 1300 nm
ne = 2.156, no = 2.232 @ 1064 nm
ne = 2.203, no = 2.286 @ 632.8 nm
Thermal Expansion Coefficient
(@ 25oC)
//a, 2.0x10-6/K
//c, 16.7x10-6/K
Thermal Conductivity Coefficient: 38 W/m/K at 250 oC
Thermal Optical Coefficient dno/dT=-0.874x10-6/K at 1.4 µm
dne/dT=39.073x10-6/K at 1.4 µm
The Sellmeier equations (Pure LN))
 (λ in µm)
no2 = 4.9048+0.11768/(λ2-0.04750)-0.027169λ2
ne2 = 4.5820+0.099169/(λ2-0.04443)-0.021950λ2


MgO doped LiNbO3 (MgO:LN) has similar linear optical properties to pure LiNbO3, but the photorefractive damage threshold is much higher.

The Sellmeier equations of MgO:LN  are:

MgO dopant 5 mol%


no2 = 4.9017+0.112280/(λ2-0.049656)-0.039636λ2
ne2 = 4.5583+0.091806/(λ2-0.048086)-0.032068λ2

Common cut orientations:


LN or MgO:LN crystals are uncoated unless the coating is specified.  Anti-reflection coatings (AR coatings) with R < 0.25% at the specified wavelengths are available upon request. 

If you do not find the suitable products above, you may let us know your requirements or applications in the form below. Our sales or technical staff will get back to you as soon as possible.

Please provide your contact information for us to get back to you:

Work Phone:
E-Mail Address:
Enter the code in the box below:
Newlight Photonics Inc. © 2024