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LiNbO3

Keywords: Linbo3, LN crystal, MgO:Linbo3, Lithium niobate, Mgo doped linbo3
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Product description

Introduction:

Lithium Niobate (LiNbO3) is a ferroelectric material suitable for a variety of applications.

Its versatility is made possible by the excellent Electro-Optic, nonlinear, and piezoelectric properties of the intrinsic material. The boules are typically grown in Czochralsky method.

 

Basic Properties of LiNbO3:

Crystal Structure:

Trigonal

Space Group:

3m

Cell Parameters:

a=b=5.148Å , c=13.863Å

Melting Point:

1253° C

Curie Temperature:

1140° C

Mohs Hardness:

5

Density:

4.64 g/cm3

Hygroscopic Susceptibility

None

Optical Homogeneity

5x10-5/cm

Transparency Range

420nm-5200nm

Absorption Coefficient:

~0.1%/cm @ 1064nm

Refractive indices at 1064nm:

ne  = 2.146, no = 2.220 @ 1300 nm

ne = 2.156, no = 2.232 @ 1064 nm

ne = 2.175, no = 2.254@ 808nm

ne = 2.203, no = 2.286 @ 632.8 nm

ne = 2.234, no = 2.323@ 532nm

Thermal Expansion Coefficient:

 

//a, 15.4x10-6/K

//c, 7.5x10-6/K

Thermal Conductivity Coefficient:

 

0.056 W/cm.K

Thermal Optical Coefficient:

dno/dT=-0.874x10-6/K at 1.4μm

dne/dT=39.073x10-6/K at 1.4μm

The Sellmeier equations(λin μm)

no2 = 4.9048 + 0.11768/(λ2-0.04750)-0.027169λ2

ne2 = 4.5820 + 0.099169/(λ2-0.04443)-0.021950λ2


 

Nonlinear Optical Properties:

 

NLO Coefficients (1064nm)

d33 = -34.4 pm/V, d31 = d15 = -5.95 pm/V, d22 = 3.07 pm/V

Electro-Optic Coefficients

γT33 = 32 pm/V,  γS33 = 31 pm/V,

γT31 =10 pm/V,   γS31 =8.6 pm/V,

γT22 = 6.8 pm/V, γS22 = 3.4 pm/V,

 

Half-Wave Voltage, DC

Electrical field ||z, light || x or y:

Electrical field || x or y, light ||z:

~ 3 KV

~ 4 KV

Damage Threshold

~ 100 MW/cm2

 

 

Main features

  • Broad transparency region from 420 nm to 5200 nm
  • High nonlinear, electro-optic and acousto-optic coefcients
  • Nonhygroscopic, mechanically, and chemically stable

Application

  • Electro-optic modulation and Q-switching
  • Optical parametric oscillators (OPO) , Second Harmonic Generation (SHG)
  • Frequency mixing (DFG) to generate tunable infrared wavelengths

 

LiNbO3’s Specifications:

Material:                                     Laser grade congruent LiNbO3  or 5%MgO:LiNbO3 

Orientation:                                ± 30 arcmin

Dimensional Tolerance:                 ± 0.1mm

Surface quality:                           40/20 Scratch/Dig 

Flatness:                                     λ/6 at 633 nm

Perpendicularity:                         15 arc min

Parallelism:                                 better than 20 arc sec

Clear Aperture:                            > Central 90%

AR Coating:                                 uncoated, or upon request

 

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