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linbo3 crystal
linbo3 crystal

LiNbO3 & MgO: LiNbO3 Laser Crystals

Lithium niobate (LiNbO3, LN) is a multi-purpose material in photonics and optoelectronics fields. It features excellent nonlinear, electro-optic, and piezoelectric properties. it is widely used as electro-optic modulators and Q-switches for Nd:YAG, Nd:YLF and Ti:Sapphire lasers as well as modulators for fiber optics.

Applications of LiNbO3 & MgO: LiNbO3 Laser Crystals


  • Electro-optic modulation and Q-switching

  • Optical parametric oscillators (OPO) pumped at 1064 nm

  • Quasi-phase-matched devices with periodically poled lithium niobate (PPLN)


Advantages of LiNbO3 & MgO: LiNbO3 Laser Crystals


  • Broad transparency region from 420 nm to 5200 nm

  • High nonlinear, electro-optic and acousto-optic coefficients

  • Nonhygroscopic, mechanically, and chemically stable


Specifications of LiNbO3 & MgO: LiNbO3 Laser Crystals


Tolerance of cutting angle

△θ≤±0.25°,△φ≤±0.25°

Tolerance of dimension

Dimension+0/-0.1 mm,L:±0.1mm

Flatness

λ/10 @ 632.8nm

Wavefront distortion

λ/8@ 632.8nm

Surface quality

10/5 per MIL-O-13830A

Parallelism

20″

Perpendicularity

5′

Clear Aperture:

> 90%

Chamfer:

< 0.1 mm @ 45°

Size

Upon customer request

Coating

AR/HR coating upon customer’s request

Electrodes

Gold/Chrome plated on X-faces

Damage Threshold

750MW/CM2 at 1064nm, TEM00, 10ns, 10Hz

Quality Warranty Period

One year under proper use


Nonlinear Properties of LiNBO3 Crystal


NLO Coefficients

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

Effective NLO coefficients

deff =5.7 pm/V for frequency doubling 1300 nm;
deff =5.3 pm/V for OPO pumped at 1064 nm;
deff =17.6 pm/V for quasi-phase-matched structure.

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,

Photorefractive Damage Threshold

50 MW/cm2 (10 ns, 1064 nm)

Surface Damage Threshold

300 MW/cm2 (10 ns, 1064 nm)


Physical Properties of LiNBO3 Crystal


Chemical Formula

LiNbO3

Lattice Constant, A

a=b=5.148 Å, c=13.863 Å

Melting Point

1250℃

Density

4.64g/cm3

Curie Temperature

~ 1140℃

Mohs Hardness

5

Thermal Expansion

a11 =15.4×10^-6/K a33 =7.5×10^-6/K

Thermal Conductivity, W/(m K) at 300 K

5.6

Refractive Indices

n0 =2.286 ne =2.203 @632.8nm

Nonlinear Optical Coefficients, p/m/V at 1064 nm

d31 = -4.5 d33 = -0.27 d22 = 2.1

Electro-Optical Coefficients, pm/V at 633nm

γT33 =31, γs 31=9, γs 22 =3.4

Transmittance Range Transmittance

420~ 5200nm >68% @632.8nm

The Sellmeier equations (λ: um)

n0²(λ)=4.9048+0.11768/(λ²-0.04750)-0.027169×λ² ne²(λ)=4.5820+0.099169/(λ²-0.04443)-0.021950×λ²


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