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LiNbO3

LiNbO3 Crystal Lithium Niobate

 

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.

 

Technical parameters of LiNbO3

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

 

Optical and Nonlinear properties of LiNbO3 crystal 

Transparency Range

160-2600nm

SHG Phase Matchable Range

551-2600nm (Type I) 790-2150nm (Type II)

Therm-optic Coefficient (/℃, λ in μm)

dnx/dT=-9.3x10-6

dny/dT=-13.6x10-6

dnz/dT=(-6.3-2.1λ)x10-6

Absorption Coefficients

<0.1%/cm at 1064nm <0.3%/cm at 532nm

Angle Acceptance

6.54mrad·cm (φ, Type I,1064 SHG)

15.27mrad·cm (θ, Type II,1064 SHG)

Temperature Acceptance

4.7℃·cm (Type I, 1064 SHG)

7.5℃·cm (Type II, 1064 SHG)

Spectral Acceptance

1.0nm·cm (Type I, 1064 SHG)

1.3nm·cm (Type II, 1064 SHG)

Walk-off Angle

0.60° (Type I 1064 SHG)

0.12° (Type II 1064 SHG)

NLO Coefficients

deff(I)=d32cosΦ (Type I in XY plane)

deff(I)=d31cos2θ+d32sin2θ (Type I in XZ plane)

deff(II)=d31cosθ (Type II in YZ plane)

deff(II)=d31cos2θ+d32sin2θ (Type II in XZ plane)

Non-vanished NLO susceptibilities

d31=1.05± 0.09 pm/V

d32= -0.98± 0.09 pm/V

d33=0.05± 0.006 pm/V

Sellmeier Equations (λ in μm)

nx2=2.454140+0.011249/(λ2-0.011350)-0.014591λ2-6.60×10-5λ4

ny2=2.539070+0.012711/(λ2-0.012523)-0.018540λ2+2.00×10-4λ4

nz2=2.586179+0.013099/(λ2-0.011893)-0.017968λ2-2.26×10-4λ4

 

Physical 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)