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LiNbO3

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.
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CASTECH provides:

•  50,000 to 100,000 pcs/month of LiNbO3 wedges used for fiber optical isolators and circulators;
•  Reliable Delivery;
•  Strict quality control;
•  Technical support;
•  Very competitive price.

 

Table 1. Basic Properties of LiNbO3

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

 

Table 2. Specifications of LiNbO3 

Aperture 1.0×1.0 mm to  4×4 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 1.25mm×1.25mm×0.5mm with 13°  or 15° wedge,phi=22.5°

 

Note: Other sizes and coatings are available upon request.

Keyword:
Birefringent crystal LiNbO3
Fiber isolator
Circulator
Optical homogeneity
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LiNbO3
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  • LiNbO3

  • 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.
Description
Cas'Tech Class
Parameters
Download

CASTECH provides:

•  50,000 to 100,000 pcs/month of LiNbO3 wedges used for fiber optical isolators and circulators;
•  Reliable Delivery;
•  Strict quality control;
•  Technical support;
•  Very competitive price.

 

Table 1. Basic Properties of LiNbO3

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

 

Table 2. Specifications of LiNbO3 

Aperture 1.0×1.0 mm to  4×4 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 1.25mm×1.25mm×0.5mm with 13°  or 15° wedge,phi=22.5°

 

Note: Other sizes and coatings are available upon request.

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