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Nd³⁺:KY(WO₄)₂ (Nd:KYW) is a high‑performance laser crystal material. The crystal possesses a high stimulated emission cross section, excellent thermomechanical properties, and a broad absorption bandwidth, enabling efficient laser output. It shows great potential especially in the mid‑infrared band and in Raman laser conversion. Its stable physicochemical characteristics make it suitable for high‑power, high‑repetition‑rate laser systems.
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Property
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Value
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Remarks
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Chemical Formula
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Nd³⁺:KY(WO₄)₂, Nd:KYW
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Crystal Structure
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Monoclinic
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Lattice Parameters
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a=10.66 Å, b=10.42 Å, c=7.54 Å, β=130.8°
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Refractive Index
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n₉≈2.01, nₚ≈1.97, nₘ≈2.00, test wavelength 1064 nm, custom wavelengths available
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1064 nm
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Mohs Hardness
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4–5
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Thermal Conductivity
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Kₐ≈2.8 W/m·K, Kᵦ≈3.9 W/m·K, K𝒸≈3.5 W/m·K
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Room temperature
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Melting Point
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1080 °C
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Density
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7.15 g/cm³
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Thermal Expansion Coefficients
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αₐ≈4.2×10⁻⁶/°C, αᵦ≈3.8×10⁻⁶/°C, α𝒸≈8.8×10⁻⁶/°C
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Room temperature
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Absorption Bandwidth
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811 nm (FWHM 13 nm)
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Item
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Specification
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Doping Concentration
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0.5% – 3.5 at.%
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Maximum Length
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45 mm
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Dimensional Tolerance
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Diameter tolerance: ±0.05 mm, Length tolerance: ±0.1 mm, custom sizes accepted
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Surface Finish
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20/10 (per MIL-PRF-13830B standard)
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Flatness
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≤λ/8 @ 633 nm
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Parallelism
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20 arcsec
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Perpendicularity
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≤15 arcmin
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Chamfer
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≤0.2 mm × 45°
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Edge Chipping
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≤0.1 mm
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Coating
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Custom coating design service available
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