LiNbO3 Crystal

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LiNbO3 crystals are the most commonly used material for pockel cells, Q-switches and phase modulators, waveguide substrates, surface acoustic wave (SAW) wafers, etc.

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Detail

LiNbO3 crystals are the most commonly used material for pockel cells, Q-switches and phase modulators, waveguide substrates, surface acoustic wave (SAW) wafers, etc.

Description

Lithium niobate (LiNbO3, LN) crystals doped with iron (Fe:LiNbO3) is an attractive photorefractive material, due to high photorefractive sensitivity, high

electro-optic coefficients and diffraction efficiency, chemomechanical properties. Fe:LiNbO3 crystals are grown by Czochralsky method and available

in large size. Wide range of available dopants and levels enable to adjust material properties for particular applications. What is more, Fe:LiNbO3 crystals

feature ease to handle, low cost, therefore suitable for volume production.

Main features

High electro-optic coefficient (r41=5 pm/V)

High phase conjugation efficiency

Available in large size elements or wafers up to 3”

Customization available upon request

Application examples

Spatial light modulators

Optical switches

Holographic recording

Optical waveguides

Main properties

Chemical formula: Fe:LiNbO3

Crystal structure: Trigonal, 3m

Density: 4,64 g/cm3

Mohs hardness: 5

Transparency range : 0,35 - 5,5 μm

Refractive indices @0,63 μm: ne = 2,20 no = 2,29

Electro-optic coefficients: r22 = 6,8 pm/V r31 = 10 pm/V r33 = 32 pm/V

Dielectric constants: e11 = 85 e33 = 30

LiNbO3 Crystal Specification or or based on clients' requirements
Growth Method	Czochralski
Crystal Structure	Trigonal
Lattice Constant	a=b=5.148? c=13.863 ?
Melting Point	1250℃
Curie Temperature	1140℃
Density	4.64(g/cm3)
Mohs Hardness	5（mohs）
Transmission Wavelength	0.4-2.9μm
Refractive Index	no=2.286 ne=2.203 （632.8nm）
Intensity of Spontaneous Polarization	50×10C/cm
Nonlinear Coefficient	d22 = 2.1 d31 = - 4.5 d33 = -0.27 （pmv-1）
Electro-optic Coefficient	γ13=8.6，γ22=3.4，γ33=30.8，γ51=28.0，（pmv-1）
Optical Damage Threshold	250 MW/cm2 @ 1064 nm, 10nsec.
Transmittance	370～5000nm >68%
Transmittance	（632.8nm）
Thermal Expansion	//a, 2.0 x 10-6 / K
Thermal Expansion	//c, 16.7 x 10-6 / K
Absorption Loss	@ 1064 nm < 0.1 %/cm
Material	Domestic or foreign materials are selected based on clients' requests
Dimension	Equal to or less than ?4″
Dimensional Tolerance	Z axis: ±0.3mm X axis, Y axis: ±0.1mm
Surface Quality	10-5
Chamfer	Less than 0.5mm, 45 o±5 o
Crystal Orientation Accuracy	Z axis: 5′ X, Y axis:<10′
Flatness	v8 （632.8nm）
Parallelism	<10′
Coating	R<0.2%（1064nm）
Wavefront Distortion	<N4（633nm）
Extinction Ratio	>400:1(633nm)φ6mm beam
Package	Class 100 clean bag, Class 1000 super clean room