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Potassium niobate possesses the largest nonlinear coefficients for wavelength
conversion of all commercially available inorganic materials. Strong, natural
birefringence(ne-no=0.22) combined with high nonlinearity make potassium
niobate one of the most versatile materials for SHG, SFM and OPO nonlinear
conversation.
Red Optronics supplies a wide variety of finished KNbO3.
Our standard product includes:
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Aperture:
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2 ~ 10mm
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Length:
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0.3 ~ 20mm
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Configuration: |
Flat, spherical,
parallel and wedged. |
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Coating:
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Antireflective and
reflective etc upon customer request |
Typical Specification and Tolerance:
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Lateral
dimension tolerance: |
+/-0.2mm |
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Length
tolerance: |
+/-0.2mm |
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Perpendicularity of
polished face to sides: |
30 arc minutes |
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Parallelism: |
15 arc minutes
|
|
Surface quality |
Better than 20/10
|
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Surface flatness
: |
l/4
@ 632.8nm
|
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Clear
aperture |
Central 80%
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Physical and Optical Properties:
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Symmetry |
orthorhombic |
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Point Group |
mm2 (at temperature from -50°C
to 222+/-4°C) |
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Lattice Parameters |
a = 5.68961A, b = 3.9692A, c =
5.7256A |
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Thermal Expansion |
aa=5.010x10-6/°C
ab=1.410x10-5/°C
ac=5.010x10-7/°C |
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Density |
4.62g/cm3 |
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Hardness |
5
Mohs |
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Phase Transition Temperature |
-50°C;
220°C;
430°C |
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Transparent
Range
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400
- 4500 nm
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Absorption
Loss
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<=1%/cm
at 1064nm
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Damage
Threshold
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>=4J/cm2
at 527nm (500ps)
>=6J/cm2
at 1054nm (700ps)
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Sellmeier
equations: (λ in
um)
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nx2
=
4.4208 + 0.10044/(λ2
- 0.054084) - 0.019592 λ2
ny2
=
4.8355 + 0.12839/(λ2
- 0.056342) - 0.025379 λ2
nz2
=
4.9873 + 0.15149/(λ2
- 0.064143) - 0.028775 λ2
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