Fused Silica Aspheres 1µm Laser Optics

II-VI Infrared, the world leader in laser optics, introduces customized fused silica aspheres for direct diode and fiber or disk laser applications at powers greater than 1kW. Fused silica aspheres are designed to be diffraction limited and achieve smaller spot sizes than typical spherical lenses. Whether for welding or cutting, II-VI offers low-absorbing, high quality lenses using industry-leading manufacturing resources and superior coating technology.

Capabilities

  • 15-200mm diameter optics
  • Custom optical designs (i.e. axicons, spherical lenses, etc.) available upon request
  • Ion-Beam Sputtered (IBS) coatings available; Ion-Assisted Deposition (IAD) also available

High Power Grade

  • Low-absorbing across larger wavelength band
  • Lowest OH content
  • Recommended for direct diode laser applications
Wavelength Range Total Absorption (ppm/cm)
1030nm-1080nm ≤ 10ppm at 1064nm*

Standard Grade

  • Low-absorbing from 1030nm-1080nm
  • Low OH content
  • Recommended for mid-power fiber laser applications
Wavelength Range Total Absorption (ppm/cm)
1030nm-1080nm ≤30ppm at 1064nm*

 

*Total absorption based on 5mm thick witness sample

 

 

Mechanical Properties
Density 2.20g/cm3
Young’s Modulus 70-73 GPa
Poisson’s Ratio 0.16-0.17
Knoop Hardness 500-650kg/mm2
Thermal Properties
Thermal Conductivity 1.38W/mK (20°C)
Thermal Expansion 0.58x10-6 ppm/C
Manufacturing Capabilities
Diameter/Thickness +/-50μm
ETV ≤10μm
Asphere Power ≤2fr at 632.8nm
Asphere Irregularity ≤1fr at 632.8nm
Surface Roughness ≤3nm RMS
Surface Quality 20/10 or better
Clear Aperture ≥90%
Focal Length ≤0.1%
Reflectivity ≤0.2% per surface 1030nm-1080nm
Mechanical Properties
Density 2.20g/cm3
Young’s Modulus 70-73 GPa
Poisson’s Ratio 0.16-0.17
Knoop Hardness 500-650kg/mm2