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LiNbO3 -LN ( Lithium Niobate)

LiNbO3 Crystal is widely used as frequency doublers for wavelength ˃ 1µm and optical parametric oscillators (OPOs) pumped at 1064 nm as well as quasi-phase-matched (QPM) devives.

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NLO Crystals

Crystals

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Description

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Introduction

Lithium Niobate (LiNbO₃ or LN) is widely used as frequency doublers for wavelength ˃ 1µm, optical parametric oscillators (OPOs) pumped at 1064 nm as well as quasi-phase-matched (QPM) devices. Additionally due to its large Electro-Optic (E-O) and Acousto-Optic (A-O) coefficients, LiNbO₃ crystal is the most commonly used material for Pockel cells, Q-switches and phase modulators, waveguide substrates, and surface acoustic wave (SAW) wafers, etc. CASTECH can provide LiNO₃ crystals with high quality and large size for all these applications.

CASTECH provides

50,000 to 100,000 pcs/month of LiNbO₃ wedges used for fiber optical isolators and circulators
Strict quality control
Technical support
Fast delivery
Competitive price

Basic Properties

Table 1. Chemical and Physical Properties
Crystal Structure	Trigonal, Space group R3c, Point group 3m
Lattice Parameter	a = 5.148 Å, c = 13.863 Å
Melting Point	1253℃
Curie Temperature	1140℃
Mohs Hardness	5 Mohs
Density	4.64 g/cm³
Elastic Stiffness Coefficients	C^E₁₁= 2.33 ( × 10¹¹ N/m²) C^E₃₃ = 2.77 ( × 10¹¹ N/m²)

Table 2. Optical and Nonlinear Optical Properties
Transparency Range	420-5200 nm
Optical Homogeneity	~5 ×10^-5 /cm
Refractive Indices	n_e = 2.146, n_o = 2.220 @1300 nm n_e = 2.156, no = 2.232 @1064 nm n_e = 2.203, n_o = 2.286 @632.8 nm
NLO Coefficients	d₃₃ = 86 × d₃₆ (KDP) = 37.84 pm/V d₃₁ = 11.6 × d₃₆ (KDP) = 5.10 pm/V d₂₂ = 5.6 × d₃₆(KDP) = 2.46 pm/V
Effective NLO Coefficients	d_eff(I) = d₃₁sinθ - d₂₂cosθsin3Φ d_eff (II) = d₂₂cos2θ cos3Φ
Sellmeier Equations (λ in μm)	n_o²= 4.9048 + 0.11768 / (λ² - 0.04750) - 0.027169 λ² n_e²= 4.5820 + 0.099169 /(λ²- 0.04443) - 0.02195 λ²
Damage Threshold	100 MW/cm² (10 ns, 1064 nm)

Table 3. Thermal and Electrical Properties of LiNbO₃
Thermal Conductivity	38 W/m/K @25 ℃
Thermal Expansion Coefficients (at 25℃)	//a, 2.0 × 10^-6 /K //c, 2.2 × 10^-6 /K
Resistivity	2×10^-6 Ω·cm @200 ℃
Dielectric Constants	ε^S₁₁/ε₀ = 43, ε^T₁₁/ε₀ = 78 ε^S₃₃/ε₀ = 28, ε^T₃₃/ε₀ = 32
Piezoelectric Strain Constant	D₂₂ = 2.04 × 10^-11 C/N D₃₃ = 19.22 × 10^-11 C/N
Electro-Optic Coefficients	γ^T₃₃= 32 pm/V, γ^S₃₃ = 31 pm/V, γ^T₃₁ = 10 pm/V, γ^S₃₁ = 8.6 pm/V, γ^T₂₂ = 6.8 pm/V, γ^S₂₂= 3.4 pm/V
Half-Wave Voltage, DC Electrical field // z, light ⊥ z; Electrical field // x or y, light // z;	3.03 KV 4.02 KV

Table 4. Specifications
Dimension Tolerance	(W ± 0.1 mm) × (H ± 0.1mm) × (L ± 0.2mm)
Clear Aperture	Central 90% of the diameter
Surface Quality (Scratch/Dig)	20/10 to MIL-PRF-13830B
Flatness	λ/8 @633 nm
Transmitted Wavefront Distortion	≦λ/4 @633 nm
Parallelism	20 arc sec
Perpendicularity	≦15 arc min
Angle Tolerance	≦±0.5°
Quality Warranty Period	One year under proper use

AR-coatings

CASTECH provides the following AR-coatings:

Dual Band AR-coating (DBAR) at 1064/532 nm on both surface, with low reflectance (R<0.2% @1064 nm and R<0.5% @532 nm)
AR-coating and gold/chrome plated on side faces for E-O applications
Other coatings are available upon request

Keyword:

Nonlinear crystal

LiNbO3

LN

acousto-optic coefficient

quasi-phase-matched

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LiNbO3 -LN ( Lithium Niobate)
LiNbO3 Crystal is widely used as frequency doublers for wavelength ˃ 1µm and optical parametric oscillators (OPOs) pumped at 1064 nm as well as quasi-phase-matched (QPM) devives.

Description

Cas'Tech Class

Parameters

Download

Introduction

Lithium Niobate (LiNbO₃ or LN) is widely used as frequency doublers for wavelength ˃ 1µm, optical parametric oscillators (OPOs) pumped at 1064 nm as well as quasi-phase-matched (QPM) devices. Additionally due to its large Electro-Optic (E-O) and Acousto-Optic (A-O) coefficients, LiNbO₃ crystal is the most commonly used material for Pockel cells, Q-switches and phase modulators, waveguide substrates, and surface acoustic wave (SAW) wafers, etc. CASTECH can provide LiNO₃ crystals with high quality and large size for all these applications.

CASTECH provides

50,000 to 100,000 pcs/month of LiNbO₃ wedges used for fiber optical isolators and circulators
Strict quality control
Technical support
Fast delivery
Competitive price

Basic Properties

Table 1. Chemical and Physical Properties
Crystal Structure	Trigonal, Space group R3c, Point group 3m
Lattice Parameter	a = 5.148 Å, c = 13.863 Å
Melting Point	1253℃
Curie Temperature	1140℃
Mohs Hardness	5 Mohs
Density	4.64 g/cm³
Elastic Stiffness Coefficients	C^E₁₁= 2.33 ( × 10¹¹ N/m²) C^E₃₃ = 2.77 ( × 10¹¹ N/m²)

Table 2. Optical and Nonlinear Optical Properties
Transparency Range	420-5200 nm
Optical Homogeneity	~5 ×10^-5 /cm
Refractive Indices	n_e = 2.146, n_o = 2.220 @1300 nm n_e = 2.156, no = 2.232 @1064 nm n_e = 2.203, n_o = 2.286 @632.8 nm
NLO Coefficients	d₃₃ = 86 × d₃₆ (KDP) = 37.84 pm/V d₃₁ = 11.6 × d₃₆ (KDP) = 5.10 pm/V d₂₂ = 5.6 × d₃₆(KDP) = 2.46 pm/V
Effective NLO Coefficients	d_eff(I) = d₃₁sinθ - d₂₂cosθsin3Φ d_eff (II) = d₂₂cos2θ cos3Φ
Sellmeier Equations (λ in μm)	n_o²= 4.9048 + 0.11768 / (λ² - 0.04750) - 0.027169 λ² n_e²= 4.5820 + 0.099169 /(λ²- 0.04443) - 0.02195 λ²
Damage Threshold	100 MW/cm² (10 ns, 1064 nm)

Table 3. Thermal and Electrical Properties of LiNbO₃
Thermal Conductivity	38 W/m/K @25 ℃
Thermal Expansion Coefficients (at 25℃)	//a, 2.0 × 10^-6 /K //c, 2.2 × 10^-6 /K
Resistivity	2×10^-6 Ω·cm @200 ℃
Dielectric Constants	ε^S₁₁/ε₀ = 43, ε^T₁₁/ε₀ = 78 ε^S₃₃/ε₀ = 28, ε^T₃₃/ε₀ = 32
Piezoelectric Strain Constant	D₂₂ = 2.04 × 10^-11 C/N D₃₃ = 19.22 × 10^-11 C/N
Electro-Optic Coefficients	γ^T₃₃= 32 pm/V, γ^S₃₃ = 31 pm/V, γ^T₃₁ = 10 pm/V, γ^S₃₁ = 8.6 pm/V, γ^T₂₂ = 6.8 pm/V, γ^S₂₂= 3.4 pm/V
Half-Wave Voltage, DC Electrical field // z, light ⊥ z; Electrical field // x or y, light // z;	3.03 KV 4.02 KV

Table 4. Specifications
Dimension Tolerance	(W ± 0.1 mm) × (H ± 0.1mm) × (L ± 0.2mm)
Clear Aperture	Central 90% of the diameter
Surface Quality (Scratch/Dig)	20/10 to MIL-PRF-13830B
Flatness	λ/8 @633 nm
Transmitted Wavefront Distortion	≦λ/4 @633 nm
Parallelism	20 arc sec
Perpendicularity	≦15 arc min
Angle Tolerance	≦±0.5°
Quality Warranty Period	One year under proper use

AR-coatings

CASTECH provides the following AR-coatings:

Dual Band AR-coating (DBAR) at 1064/532 nm on both surface, with low reflectance (R<0.2% @1064 nm and R<0.5% @532 nm)
AR-coating and gold/chrome plated on side faces for E-O applications
Other coatings are available upon request