50.8mm Dia., 3.18mm Thick, Uncoated, Laser Grade C-Axis Sapphire Window

Product Details C-Axis Cut Sapphire to Eliminate Birefringence 10-5 Surface Quality and λ/10 TWFD Uncoated or IBS AR Coated for 1000-1100nm Ideal for High Power Laser Applications Laser Grade C-Axis Sapphire Windows are precision optical windows cut to the C-axis of sapphire to eliminate the inherent birefringent properties of the material. C-axis sapphire, also referred to as C-plane sapphire or zero degree sapphire, provides high transmission from the ultraviolet (UV) to the mid-infrared, excellent chemical resistance, and high surface hardness second only to diamond. Featuring laser grade 10-5 surface quality and λ/10 transmitted wavefront distortion (TWFD), these windows are ideal for use in laser applications or for integration into laser systems. Laser Grade C-Axis Sapphire Windows are available uncoated or with an ion-beam sputtered (IBS) antireflection (AR) coating for 1000 – 1100nm, ideal for Nd:YAG, Yb:doped fiber, or Yb:YAG laser applications. Standard imperial sizes facilitate drop-in replacement into existing laser systems; please contact us if your application requires a Laser Grade C-Axis Sapphire Window with a custom size or coating. Specifications General Type: Protective Window Type of Window: Crystal Physical & Mechanical Properties Clear Aperture CA (mm): 45.00 Diameter (mm): 50.80 +0.00/-0.10 Thickness (mm): 3.18 ±0.20 Parallelism (arcmin): <3 Bevel: Protective as needed Edges: Fine Ground Poisson's Ratio: 0.27 Young's Modulus (GPa): 435 Knoop Hardness (kg/mm 2 ): 1,900.00 Knoop Hardness (GPa): 1,900 Optical Properties Coating: Uncoated Substrate: Many glass manufacturers offer the same material characteristics under different trade names. Learn More Sapphire (Al 2 O 3 ) Index of Refraction (n d ): 1.77 Surface Quality: 10-5 Transmitted Wavefront, P-V: λ/10 over 25.4mm of Clear Aperture Abbe Number (v d ): 72.24 Birefringence (n o -n e ): 0 Axis Orientation: C-axis Wavelength Range (nm): 200 - 5500 Material Properties Density (g/cm 3 ): 3.97 Coefficient of Thermal Expansion CTE (10 -6 /°C): 8.8 Regulatory Compliance Certificate of Conformance: View ×