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LiNbO3 crystal Lithium niobate

 

LiNbO3 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.

 

  • Shipping Port:

    Fuzhou, China
  • Lead Time:

    3-4weeks
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  • Product Detail

Descriptions

Lithium niobate (LiNbO3, LN) is a multi-purpose material in photonics and optoelectronics fields. As a highly versatile lithium niobate crystal (often referred to as an LN crystal), it features excellent nonlinear, electro-optic, and piezoelectric properties. This high-purity LiNbO3 single crystal 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. The unique LiNbO3 crystal structure allows it to perform exceptionally well in various complex optical systems.

Main Applications

  • 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

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

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 (Lithium niobate LiNbO3)
Lattice Constant, Å a = b = 5.148 Å, c = 13.863 Å
Melting Point 1250°C
Density 4.64 g/cm3
Curie Temperature ~ 1140°C
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, pm/V at 1064 nm d31 = -4.5, d33 = -0.27, d22 = 2.1
Electro-Optical Coefficients, pm/V at 633nm γT33 = 31, γs31 = 9, γs22 = 3.4
Transmittance Range 420 ~ 5200 nm (>68% @632.8nm)
The Sellmeier equations (λ: μm) n02(λ) = 4.9048 + 0.11768/(λ2 - 0.04750) - 0.027169 × λ2
ne2(λ) = 4.5820 + 0.099169/(λ2 - 0.04443) - 0.021950 × λ2

 

HGO Offers LiNbO3 Specifications

Tolerance of cutting angle Δθ ≤ ±0.25°, Δφ ≤ ±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 (Custom LiNbO3 crystal sizes available)
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

Frequently Asked Questions (FAQ)

1. What is the difference between LiNbO3 and an LBO crystal?
While both are nonlinear optical materials, an LBO crystal (Lithium Triborate) is primarily used for high-power UV and visible light generation (like SHG/THG) due to its high damage threshold. A LiNbO3 crystal excels in electro-optic modulation, Q-switching, and optical parametric oscillators (OPO) because of its broad transparency and strong electro-optic coefficients.

2. How does the LiNbO3 crystal structure affect its performance?
The LiNbO3 crystal structure belongs to the trigonal crystal system. This unique asymmetric structure is the fundamental reason behind its strong piezoelectric, electro-optic, and nonlinear optical properties, making it indispensable for modern photonics.

3. What determines the lithium niobate price?
The lithium niobate price varies based on the dimensions, specific cut angles, doping requirements (e.g., 5% MgO doped), and custom coatings (AR/HR) or electrodes required for your specific application. Contact us for a precise quote.

Why Choose HGO?

HGO offers both pure Lithium niobate (LiNbO3, LN) and 5% MgO doped Lithium niobate crystals for Q-switches with transverse E-O modulation, second harmonic generation (SHG), sum frequency generation (SFG), different frequency generation (DFG), or optical parametric generation (OPA). High quality LiNbO3 single crystals with λ/10 wavefront distortion can be reliably supplied by HGO.

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