KTP Crystal
Potassium Titanyl Phosphate (KTiOPO4 or KTP) is widely used in both commercial and military lasers including laboratory and medical systems, range-finders, lidar, optical communication and industrial systems.
FEATURES:
Large nonlinear optical coefficient;
Wide angular bandwidth and small walk-off angle;
Broad temperature and spectral bandwidth;
High electro-optic coefficient and low dielectric constant;
Large figure of merit;
Nonhydroscopic, chemically and mechanically stable.
KTP Chemical and Structural Properties：
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Crystal Structure
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Orthorhombic, space group Pna21,point group mm2
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Lattice Parameter
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a=6.404A, b=10.616A, c=12.814A, Z=8
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Melting Point
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About 1172°C
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Mohs Hardness
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5
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Density
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3.01 g/cm3
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Thermal Conductivity Coefficient
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13W/m/K
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Thermal Expansion Coefficient
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ax=11x10-6/0C, ay=9x10-6/0C, az=0.6x10-6/0C
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BBO Optical and Nonlinear Optical Properties
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Transparency Range
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350~4500nm
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SHG Phase Matchable Range
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497 ~ 1800nm (Type II)
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Thermal-optic Coefficients (/°C)
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dnx/dT=1.1X10-5
dny/dT=1.3X10-5 dnz/dT=1.6X10-5 |
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Absorption Coefficients
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<0.1%/cm at 1064nm <1%/cm at 532nm
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For Type II SHG of a Nd:YAG laser at 1064nm
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Temperature Acceptance: 24°C-cm
Spectral Acceptance: 0.56nm-cm Angular Acceptance: 14.2mrad-cm (φ);55.3mrad-cm (q) Walk-off Angle: 0.55° |
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NLO Coefficients
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deff(II)≈(d24 - d15)sin2fsin2q - (d15sin2f + d24cos2f)sinq
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Non-vanished NLO Susceptibilities
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d31=6.5 pm/V d24=7.6 pm/V
d32= 5 pm/V d15=6.1 pm/V d33=13.7 pm/V |
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Sellmeier Equations
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nx2=3.0065+0.03901/(l 2-0.04251)-0.01327l 2
ny2=3.0333+0.04154/(l 2-0.04547)-0.01408l 2 nz2=3.3134+0.05694/(l 2-0.05658)-0.01682l 2 |
Capability:
1. Optical
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Specification
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Standard
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High Precision
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Dimensions
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Size: Up to 20x20mm2
Thickness: 0.01mm to 25mm
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Dimension Tolerance
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+/-0.1mm
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+/-0.01mm
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Wavefront Distortion
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λ/8
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λ/8
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Flatness
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λ/10
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λ/10
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Surface Quality
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10/5
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10/5
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Orientation
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+/-0.3°
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+/-0.1°
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Parallelism
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20’’
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10’’
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2. Coating
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Specificationg
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Type
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AR Coaing or P Coating
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Damage Threshold
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>500MW/cm2
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