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Fiber Optical Isolators Piezoelectric Effect Crystals Lithium Niobate - LiNbO3 Crystal Material

China ANHUI CRYSTRO CRYSTAL MATERIALS Co., Ltd. certification
China ANHUI CRYSTRO CRYSTAL MATERIALS Co., Ltd. certification
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Fiber Optical Isolators Piezoelectric Effect Crystals Lithium Niobate - LiNbO3 Crystal Material

Fiber Optical Isolators Piezoelectric Effect Crystals Lithium Niobate - LiNbO3 Crystal Material
Fiber Optical Isolators Piezoelectric Effect Crystals Lithium Niobate - LiNbO3 Crystal Material Fiber Optical Isolators Piezoelectric Effect Crystals Lithium Niobate - LiNbO3 Crystal Material Fiber Optical Isolators Piezoelectric Effect Crystals Lithium Niobate - LiNbO3 Crystal Material

Large Image :  Fiber Optical Isolators Piezoelectric Effect Crystals Lithium Niobate - LiNbO3 Crystal Material

Product Details:

Place of Origin: China
Brand Name: Crystro

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
High Light:

lgs crystals

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lanthanum gallium silicate

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.

 

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.

 

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.

 

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Contact Person: roy_luo

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