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ANHUI CRYSTRO CRYSTAL MATERIALS Co., Ltd.
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LN LiNbO3 Single Crystal

LN LiNbO3 Single Crystal
LN LiNbO3 Single Crystal LN LiNbO3 Single Crystal LN LiNbO3 Single Crystal LN LiNbO3 Single Crystal LN LiNbO3 Single Crystal LN LiNbO3 Single Crystal LN LiNbO3 Single Crystal LN LiNbO3 Single Crystal LN LiNbO3 Single Crystal

Large Image :  LN LiNbO3 Single Crystal

Product Details:
Place of Origin: China
Brand Name: Crystro
Certification: SGS/COC
Model Number: CR210.205-1
Payment & Shipping Terms:
Minimum Order Quantity: 1pc
Price: USD 20~200/pc
Packaging Details: Transparent clean box
Delivery Time: 4-5 weeks
Payment Terms: T/T, Western Union, MoneyGram, Paypal
Supply Ability: 2000pcs per month
Detailed Product Description
Material: LN LiNbO3 Single Crystal Crystal Sturucture: Trigonal, Space Group R3c, Point Group 3m
Melting Point: 1253℃ Mohs Hardness: 5
Density: 4.64g/cm3 Deliquescence: None
Transparency Range: 420-5200nm Absorption Coefficient: ~0.1%/cm @1064nm
Refractive Indices: Ne=2.156, No=2.232@1064nm Dimension Tolerance: ±0.05mm
Wedge Angle Tolerance: ±0.1° Optical Axis Orientation: ±0.5°
Flatness: λ/4 @632.8nm Surface Quality: 20/10
AR-Coating: R<0.2% @1550nm±40nm Diameter: Up To 4inch
Thickness: 0.5mm/1mm Origin: China
Delivery: 1-4 Weeks Shipment: Express,DHL.Fedex
Packing: Individual Container For Each Substrate, Packed In Bag Filled With Inert Gas.

Lithium Niobate - LiNbO3 Crystal Material

 

LiNbO3 crystal combines low cost, good mechanical and physical properties as well as high optical homogeneity. Therefore, LiNbO3 wedges have been widely used in fiber isolators and circulators.

 

LiNbO3 (Lithium niobate, LN) crystal is a negative uniaxial crystal and one of the most thoroughly characterized optical materials. With its wide transparency range in the visible and mid-infradred and the excellent chemical and mechanical stability, LN crystal can be used as a bifrengent material for applications in infrared.

 

With its large electro-optic coefficients, wide optical transparency window, and availability of high optical quality crystals, LN (lithium niobate) crystal is often the material of choice for optical modulation and Q-switch at near-infrared and infrared wavelengths. For electro-optic modulators (EOM) the crystal can be z-cut with zero residual birefringence along the direction of light propagation or x-cut with non-zero residual birefringence and the maximized effective electro-optic coefficient. For Q-switch the crystal is typically z-cut with zero residual birefringence and an electric field is applied transverse to the direction of light propagation. The piezoelectric ringing in LN is a disadvantage at high repetition frequency, but can be overcome to some extent with proper piezoelectrically damped designs.

Both pure LN and MgO doped LN (MgO:LN) crystals with gold coatings on side faces for electrodes are available

 

 

b.Crystro's GGG wafer is grown by Czochralski method.Max diameter reach 4inch,it's now the biggest size in this filed,we can custom size and specs ,rougness<0.5nm.Magneto-optical single crystals like GGG,SGGG,TGG,TSAG are our main products.
 
c.Anhui Crystro participate in the kinds exhibitions every year: Laser World of Photonics Munich, Shanghai, Photonics West in San Francisco, CIOE in Shenzhen, etc.
 

Crystro provides:

  • LiNbO3 wedges used for fiber optical isolators and circulators.
  • Reliable delivery
  • Strict quality control
  • Technical support
  • Very competitive prices

Basic Properties of LiNbO3

Crystal Sturucture  Trigonal, Space group R3c, Point group 3m
Melting Point  1253℃
Mohs Hardness  5
Density  4.64g/cm3
Deliquescence  None
Optical Homogeneity  ~5x10-5/cm
Transparency Range  420-5200nm
Absorption Coefficient  ~0.1%/cm @1064nm
Refractive Indices at 1064nm  ne=2.146, no=2.220@1300nm                               ne=2.156, no=2.232@1064nm                             ne=2.203, no=2.286@632.8nm
Thermal Expansion Coefficients (at 25℃ )  //a,2.0x10-6/K                                                         //a,2.2x10-6/K
Thermal Conductivity Coefficients  38 W/m/K at 25℃
Thermal Optical Coefficients  dno/dT=-0.874 x 10-6/K at 1.4μm               dne/dT=39.073 x 10-6/K at 1.4μm
The Sellmeier Equations (λ in μm)  no2=4.9048+0.11768/(λ2-0.04750)-0.027169λ  ne2=4.5820+0.099169/(λ2-0.04443)-0.02195λ2

 

 

Specifications of LiNbO3 wedges

Aperture  1.0 x1.0 mm2 to 4 x 4 mm2
Dimension Tolerance  ±0.05mm
Wedge Angle Tolerance  ±0.1°
Optical Axis Orientation  ±0.5°
Flatness  λ/4 @632.8nm
Surface Quality  20-10
AR-Coating  R<0.2% @1550nm±40nm
Standard Size  1.25mmx1.25mmx0.5mm with 13º or 15º wedge, phi=22.5º

 

Note: Other sizes and coatings are available upon request.

 

 

Nonlinear Optical Properties:

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)
 

 

 

Specifications of LN EO components:

Wavefront Distortion: Less than λ/8 @ 633 nm
Dimension Tolerance: (W+/-0.1 mm) x (H+/-0.1 mm) x (L+0.5/-0.1 mm)
Clear Aperture: > 90% central area
Flatness: λ/8 @ 633 nm
Surface Quality: Scratch/Dig 10/5 per MIL-O-13830A
Parallelism: better than 20 arc seconds
Perpendicularity: 5 arc minutes
Angle Tolerance: Δθ < 0.5o, Δφ < 0.5o

 

LiNbO3 is also widely used as electro-optic modulators and O-switches for Nd: YAG, Nd: YLF and Ti:Sapphire lasers as well as modulators for fiber optics. The following table list the specifications of a typical LiNbO3 crystal used as Q-switch with transverse E-O modulation. The light propagates in z-axis. The electro-optic coefficients of LiNbO3 are: r33= 32 pm/V,  r31= 10 pm/V,   r22= 6.8 pm/V at at low frequency and r33= 31 pm/V, r31= 8.6 pm/V, r22= 3.4 pm/V at high electric frequency. The halfwave voltage: Vπ=λd/no3γc1, γc=(ne/no)3γ3313.

 

LiNbOQ-switch Specifications

Size  9 X 9 X25 mm3 or 4 X 4 X 15 mm3
 Other size is available upon request
Tolerance of Size   Z-axis: ± 0.2mm
 X-axis and Y-axis: ± 0.1mm
Chanfer  less than 0.5 mm at 
Accuracy of Orientation  Z-axis: < ±5′,X-axis and Y-axis: < ±10′
Parallelism  <20′′
Finish  10/5 scratch/dig
Flatness  λ/8 at 633nm
AR-Coating  R<0.2% @1064nm
Electrodes  Gold/Chrome plated on X-faces
Wavefront Distortion  <λ/4 @633nm
Extinction Ratio  >400:1 @633nm, φ 6mm beam

 

 

LiNbO3 is also a good acousto-optic crystal and used for surface acoustic wave (SAW) wafer and A-O modulators. Crystro provides acoustic (SAW) grade LiNbO3 crystals in wafers, as-cut boules, finished components and custom fabricated elements.

 

Typical SAW Properties

Cut Type        SAW                   Velocity        Vs (m/s)    Electromechanical    Coupling Factor K2s(%)       Temperature               Coefficient of                Velocity            TCV (10-6/℃)     Temperature         Coefficient of                Delay            TCD (10-6/℃)
127.86 ° Y-X 3970 5.5 -60 78
Y-X 3485 4.3 -85 95

 

Typical Specifications

Specifications Boule Wafer
Diameter Φ3'' Φ4'' Φ3'' Φ4''
Length or Thickness (mm) ≤100 ≤50 0.35-0.5
Orientation 127.86°Y,64°Y,135°Y,X,Y,Z, and other cut
Ref.Flat Orientation X,Y
Ref.Flat Length 22±2mm 32±2mm 22±2mm 32±2mm
Front Side polishing / Mirror polished 5-15 Å
Back Side Lapping / 0.3-1.0μm
Flatness (μm) / ≤15
Bow (μm) / ≤25

 

Crystro can offer other size and specification of wafers upon request.

Crystal Structure Trigonal, Space group R3C, Point group 3m
Cell Parameters a=5.148 Å , c=13.863 Å
Melting Point 1253oC
Curie Temperature 1140oC
Mohs Hardness 5
Density: 4.64 g/cm3
Deliquescence None
Optical Homogeneity ~ 5x10-5 /cm
Transparency Range 420 -- 5200 nm
Absorption Coefficient ~0.1%/cm @ 1064 nm
Refractive indices at 1064nm
(Pure LN)
ne= 2.146, no = 2.220 @ 1300 nm
ne = 2.156, no = 2.232 @ 1064 nm
ne = 2.203, no = 2.286 @ 632.8 nm
Thermal Expansion Coefficient
(@ 25oC)
//a, 2.0x10-6/K
//c, 16.7x10-6/K
Thermal Conductivity Coefficient: 38 W/m/K at 250 oC
Thermal Optical Coefficient dno/dT=-0.874x10-6/K at 1.4 µm
dne/dT=39.073x10-6/K at 1.4 µm
The Sellmeier equations (Pure LN))
(λ in µm)
no2 = 4.9048+0.11768/(λ2-0.04750)-0.027169λ2
ne2 = 4.5820+0.099169/(λ2-0.04443)-0.021950λ2

 

 

MgO doped LiNbO3 (MgO:LN) has similar linear optical properties to pure LiNbO3, but the photorefractive damage threshold is much higher.
LN LiNbO3 Single Crystal 0

LN LiNbO3 Single Crystal 1

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