The Newlight KTP4200-78.7/0(II)-AR618/1047/1508 is a high-quality Potassium Titanyl Phosphate (KTP) nonlinear optical crystal designed for efficient frequency conversion in solid-state laser systems. This crystal is precision cut and polished to dimensions 4 × 4 × 20 mm, with angular orientation θ = 78.7°, φ = 0°, optimized for Type II phase matching.
Both optical faces are anti-reflection (AR) coated at 618 nm, 1047 nm, and 1508 nm, minimizing Fresnel losses and maximizing conversion efficiency across multiple wavelengths. Supplied unmounted, this KTP crystal is ideal for OEM integration, laboratory research, and custom laser setups involving sum-frequency generation (SFG), difference-frequency generation (DFG), or optical parametric processes.
KTP is widely valued for its high nonlinear coefficient, broad temperature acceptance, good optical damage threshold, and excellent thermal stability.
Key Features
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Manufacturer: Newlight Photonics
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Material: KTP (Potassium Titanyl Phosphate)
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Dimensions: 4 × 4 × 20 mm
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Phase Matching: Type II
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Orientation: θ = 78.7°, φ = 0°
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Coatings: AR-coated on both faces
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AR Wavelengths: 618 nm / 1047 nm / 1508 nm
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Mounting: Unmounted
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Applications: Frequency doubling, sum-frequency generation, nonlinear optics, laser research



