PHOSCTECH’s KTP crystals feature high purity, low absorption at fundamental and second harmonic generation wavelengths. We supply super grade and customer-designed KTP crystals for various applications.
Advantages:
·Large nonlinear optical (NLO) coefficients.
·Wide angular bandwidth and small walk-off angle
·Broad temperature and spectral bandwidths
·High electro-optic (E-O) coefficient and low dielectric constant
·Large figure of merit for an optical waveguide modulator
·Non-hygroscopic, good chemical and mechanical properties
Applications:
·Frequency doubling (SHG) of Nd-doped lasers for green/red output
·Frequency mixing (SFM) of Nd lasers and diode lasers for blue output
·Parametric sources（OPG, OPA and OPO）for 0.6μm-4.5μm tunable output
·E-O modulators, optical switches, directional couplers
·Optical waveguides for integrated NLO and E-O devices
Capability:
|
Attribute
|
Commercial
|
High Precision
|
|
Wavefront Distortion
|
λ/8
|
λ/8
|
|
Orientation
|
±0.5°
|
±0.2°
|
|
Dimension Tolerance
|
±0.1mm
|
±0.1mm
|
|
End-faces Configuration
|
Flat
|
|
Surface Quality
|
20-10 scratch and dig
|
0-5 scratch and dig
|
|
Flatness
|
λ/8
|
λ/10
|
|
Parallelism
|
20"
|
10"
|
|
Intrinsic Loss
|
50ppmcm-1@ 1064nm
|
Note:Additional KTP crystals and coating specifications are available upon request.
Basic Properties:
1. Structural and Physical Properties
| Chemical formula |
KTiOPO4 |
| Crystal Structure |
Orthorhombic , Point group mm2 |
| Cell Parameters |
a=6.404?,b=10.616 ? ,c=12.814 ? ,z=8 ? |
| Melting Point |
1172℃ Incongruent |
| Curie point |
936℃ |
| Mohs Hardness |
≈5.5 |
| Density |
2.945g/cm3 |
| Linear Absorption Coefficients |
α<0.001cm-1 @ λ=1064nm or 532nm |
| Hygroscopic Susceptibility |
no |
| Relative Dielectric Constant |
εeff=13 |
| Specific heat |
0.1643cal/g.℃ |
| Electrical Conductivity |
3.5×10 -8s/cm(c-axis,22℃,1KHz) |
| Thermal Conductivity |
13W/m/k |
2.Linear Optical Properties
·Transparency Range:
·350-4500nm,See Transparency Curve
·Refractive Indices
| Wavelength |
nx |
nv |
nz |
| 1064nm |
1.7377 |
1.7453 |
1.8297 |
| 532nm |
1.7780 |
1.7886 |
1.8887 |
Therm-Optic Coefficients:
dnx/dT=1.1×10-5/℃
dnv/dT=1.3×10-5/℃
dnz/dT=1.6×10-5/℃
Sellmeier Equations:
n2x=3.0065+0.03901/(λ2-0.04251)-0.01327λ2
n2v=3.0333+0.04154/(λ2-0.04547)-0.01408λ2
n2z=3.3134+0.05694/(λ2-0.05658)-0.01682λ2
3.NonLinear Optical Properties
Phase- Matchable Output Range: 492-1700nm
| NLO Coefficients: |
| d31=2.54pm/v, |
d32=4.35pm/v, |
d33=16.9pm/v, |
| d24=3.64pm/v, |
d15=1.91pm/v, |
at 1064nm, |
| deff(II) ≈(d24- d15)sin2φsin2θ-( d15sin2φ+ d24cos2φ)sinθ |
| Electro-Optic Coefficients: |
Low Frequency(pm/V) |
High Frequency(pm/V) |
| γ13 |
9.5 |
8.8 |
| γ23 |
15.7 |
13.8 |
| γ33 |
36.3 |
35.0 |
| γ51 |
7.3 |
6.9 |
| γ42 |
9.3 |
8.8 |
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KTP Crystal