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Potassium Titanyl Phosphate – KTP Crystals SKU: HGTR-0612-05
KTP (Potassium titanyl phosphate) is a nonlinear crystal mostly used in extracavity configuration when a single pass through the crystal is required. KTP crystals are optimized for SHG intracavity configuration in low peak power CW lasers. Due to the large number of passes…
Variant specifications
| Specification | Value |
|---|---|
| W, mm | 3.5 |
| H, mm | 3.5 |
| L, mm | 6.7 |
| θ | 90 |
| φ | 25 |
| Coating | AR/AR@1064+532 nm |
Shared product specifications
These specifications apply across the Potassium Titanyl Phosphate – KTP Crystals product family.
NONLINEAR PROPERTIES
| Phase matching range for: | Phase matching range for: |
| Type 2 SHG in x-y plane | 0.99÷1.08 μm |
| Type 2 SHG in x-z plane | 1.1÷3.4 μm |
| Type 2, SHG@1064 nm, cut angle θ=90°, φ=23.5° | Type 2, SHG@1064 nm, cut angle θ=90°, φ=23.5° |
| Walk-off | 4 mrad |
| Angular acceptances | Δθ = 55 mrad * cm / Δφ = 10 mrad * cm |
| Thermal acceptance | ΔT = 22 K * cm |
| Spectral acceptance | Δν = 0.56 nm * cm |
| Up to 80% extracavity SHG efficiency | |
| Effective nonlinearity | |
| x-y plane | deoe = doee = d₁₅sin²φ + d₂₄cos²φ |
| x-z plane | doeo = deoo = d₂₄sinθ |
| d₃₁= ± 1.95 pm / V d₃₂=± 3.9 pm / V | |
| d₃₃= ± 15.3 pm / V d₂₄= d₃₂d₁₅= d₃₁ | |
| Damage threshold | >500 MW / cm² / for pulses λ=1064 nm, τ=10 ns, 10 Hz, TEM₀₀ |
PHYSICAL PROPERTIES
| Crystal structure | orthorhombic |
| Point group | mm2 |
| Space group | Pna2₁ |
| Lattice constants, Å | a = 6.404, b = 10.616, c = 12.814, z = 8 |
| Density, g / cm³ | 3.01 |
| Melting point, °C | 1172 |
| Transition temperature, °C | 936 |
| Mohs hardness | 5 |
| Thermal expansion coefficients, °C⁻¹ | ax = 11×10⁻⁶, ay = 9×10⁻⁶, az = 0.6×10⁻⁶ |
| Thermal conductivity, W / m*K | 13 |
| Not hygroscopic |
OPTICAL PROPERTIES
| Transparency | 350–4400 nm | 350–4400 nm |
|---|---|---|
| Refractive indices | at 1064 nm | at 532 nm |
| nx = 1.7404 | nx = 1.7797 | |
| ny = 1.7479 | ny = 1.7897 | |
| nz = 1.8296 | nz = 1.8877 | |
| Thermooptic coefficients in 0.4 – 1.0 μm range | ∂nx / ∂T = 1.1×10⁻⁵ (K)⁻¹ | ∂nx / ∂T = 1.1×10⁻⁵ (K)⁻¹ |
| ∂ny / ∂T = 1.3×10⁻⁵ (K)⁻¹ | ∂ny / ∂T = 1.3×10⁻⁵ (K)⁻¹ | |
| ∂nz / ∂T = 1.6×10⁻⁵ (K)⁻¹ | ∂nz / ∂T = 1.6×10⁻⁵ (K)⁻¹ | |
| Wavelength dispersion of refractive indices | nx²=3.0067+0.0395 / (λ²-0.04251)-0.01247*λ² | nx²=3.0067+0.0395 / (λ²-0.04251)-0.01247*λ² |
| ny²=3.0319+0.04152 / (λ²-0.04586)-0.01337*λ² | ny²=3.0319+0.04152 / (λ²-0.04586)-0.01337*λ² | |
| nz² =3.3134+0.05694 / (λ²-0.05941)-0.016713*λ² | nz² =3.3134+0.05694 / (λ²-0.05941)-0.016713*λ² |
STANDARD SPECIFICATIONS
| Flatness | λ / 8 @ 633 nm |
| Parallelism | < 20 arcsec |
| Perpendicularity | < 5 arcmin |
| Angle tolerance | < 30 arcmin |
| Aperture tolerance | ± 0.1 mm |
| Surface quality | 10 / 5 scratch & dig per MIL-O-13830A |
| Clear aperture | 90% of full aperture |
Product brochures
Shared documentation for the complete product family.