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KTP (KTiOPO4) is widely used in commercial and military lasers, including laboratories, medical systems, range detectors, LiDAR, optical communication, and industrial laser systems...
KTP (KTiOPO4) is widely used in commercial and military lasers, including laboratories, medical systems, range detectors, LiDAR, optical communication, and industrial laser systems.
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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=6.404Å, b=10.616Å, 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/℃, ay=9x10-6/℃, az=0.6x10-6/℃
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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 (θ) Walk-off Angle: 0.55° |
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NLO Coefficients
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deff(II)≈(d24 - d15)sin2Φsin2θ - (d15sin2Φ + d24cos2Φ)sinθ
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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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Electro-optic Coefficients:
r13
r23
r33
r51
r42
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Low frequecy(pm/V) High frequency(pm/V)
9.5 8.8
15.7 13.8
36.3 35.0
7.3 6.9
9.3 8.8
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Dielectric Constant
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εeff=13
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Sellmeier Equations
(λ in μm)
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nx2=3.0065+0.03901/(λ2-0.04251)-0.01327λ2
ny2=3.0333+0.04154/(λ2-0.04547)-0.01408λ2 nz2=3.3134+0.05694/(λ2-0.05658)-0.01682λ2 |
