T-XM15R8 - Ø8 mm Concave Supermirror on Ø1" UVFS Substrate, 200 000 Finesse, 1064 nm

• Plano or Concave (1 m Radius of Curvature) Supermirrors with 1064 nm Center Wavelength
• Finesse in a Two-Mirror System:
  • 100 000 (Item #s: XM11P8 and XM11R8)
  • 200 000 (Item #s: XM15P8 and XM15R8)
• Optical Absorption: <1 ppm Typical*
• Optical Scatter: <5 ppm Typical*
• XM15x8 Mirrors have Coatings Designed for Low Thermo-Optic (TO) Noise
• Center Wavelength 1064 nm
• Mirror Shape Concave
• Finesse 200 000
• Crystalline Coating Reflectance >99.9984% at 1064 nm
• Crystalline Coating Transmission >3.5 ppm at 1064 nm
• Crystalline Coating Loss Angle <4 x 10^-5 at 300 K <5 x 10^-6 at 10 K
• Damage Threshold CW 46.2 kW/cm (1064 nm, Ø5.5 mm)
• Damage Threshold Pulsed 5 J/cm² (1030 nm, 10 ns, 10 Hz, Ø0.240 mm)
• AR Coating Reflectance (Back Side) <0.1% at Center Wavelength; 0° AOI over Central Ø5 mm
• Substrate Material Corning 7980 0A UV Fused Silica
• Surface Roughness Crystalline Coating: <1.5 Å (RMS) Back Side: <1 Å (RMS)