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Birefringence Crystal

For an optically anisotropic crystal, the refractive index varies linearly with the polarizability in the crystal. So, when the light passes through such crystals, the polarization of the exit light will be different than the polarization of the incident linght, and the birefringence phenomenon may occur.

Beam Displacer

Birefringent Wedge

PBC Core

C-Polarizer

Micro Lenses

Micro Lenses refer particularly to C-Lens or D-Lens, which widely used for collimating or coupling beams after the fiber. With more than 10 years of experiences of lean production of Micro Lenses, II-VI provide high volume C-Lens or D-Lens with different diameter from 1mm to 3mm.

C-lens

G-lens

Ball Lens

Half Ball Lens

Laser Coupling Lens

Spherical Lenses

A lens is a curved piece of ground and polished or molded material, usually glass, used for the refraction or focusing of light. II-VI provides lenses a wide range of size and materials including BK7, Fused Silica, CaF2 and other glass types specified by customers. Similar to the cylindrical lens, spherical lenses are also widely used in the different applications, and II-VI provides singlets, doublets and customized lenses assemblies.

Magneto-Optic TGG Faraday Rotator Rods

All TGG Faraday rotator materials from IPI are RoHS compliant.

Flat Top Beam Shaper for Visible & 1 µm Laser Wavelengths

Features

  • Wavelength: Visible (blue, green, red) & Fiber (1um) lasers
  • Gaussian input beams with single mode M2 <1.1 for best results.
  • Customizable output beam shapes and sizes.
  • Customizable output energy distributions.
  • Assembled unit may consist of multiple lenses, depending on desired spot size.
  • Available in customized housing
  • Lens materials: Fused Silica, Calcium Fluoride

Applications

  • Micro-materials processing
  • Drilling
  • Welding
1 Micron Cover Slides

II-VI now offers cover slides for your Fiber and YAG lasers. These optics are also known as cover glass, debris window, debris shield, and protective window and are available in various shapes and sizes. Cover slides can, at a fraction of the cost, substantially increase the lifetime of expensive lenses. II-VI can also provide nozzles and lenses for your Fiber and YAG lasers.

Material Fused Silica UV grade, Fused Quartz
Surface Quality 20/10, 10/5
Transmitted Wavefront < 3 waves @ 632.8nm
Diameter tolerance +0/-0.127mm
Edge Thickness tolerance +/- 0.2mm
Clear Aperture 90% of central diameter
Reflection at 1064nm, 1070nm, or 1080nm <0.2%R/surface
Damage Threshold >15J/cm2, 10ns

 

1 Micron High-Power Direct-Diode Laser (HPDDL) Beam Integrators

The 1 micron (0.8 - 1.0 µm) high-power direct-diode laser (HPDDL) is becoming an increasingly popular tool for materials processing, thanks to its small physical size, low initial capital cost, electrical efficiency, and long maintenance intervals. However, the highly divergent output of HPDDLs require specialized optics to make these tools useful.
II-VI Infrared's 1 micron ZnS MS beam integrators are ideally suited to the challenge of directing HPDDL output onto a work surface. Producing relatively flat intensity profiles and a square focus area, these faceted, diamond-turned precision optics, when combined with HPDDL output, are ideally suited for cladding, heat treating, and welding applications.

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
Sapphire Aspheres for High-power 1μm Laser

II-VI, a global leader in laser optics solutions, introduces aspheric sapphire optics for the high-power 1 micron market. Sapphire is an alternative to fused silica with exceptional material properties for high-power performance, including increased thermal conductivity, refractive index, and hardness. Used in demanding 1 micron cutting and welding applications, II-VI’s sapphire aspheres enable smaller, lighter designs with fewer lenses and longer lifetime, thus reducing system operating costs.

  • Sapphire aspheres decrease contamination effects on laser performance, meaning less downtime for cleaning and servicing.
  • Improved thermal conductivity offers significant advantage over fused silica.
  • High quality water-cooled mounts are recommended for high power.
  • Higher power handling allows for reduced clear aperture size compared to fused silica.
  • Higher index of refraction allows for shallower lenses compared to fused silica.
  • Laser induced focal shift is 50% of fused silica for the same absorbed power.
  • Laser induced focal shift rise time is three times faster than that of fused silica.


Sapphire’s power-handling ability of 20 kW has been demonstrated; see “Comparison of 1 μm Optical Materials for High-Power Laser Processing” by II-VI optical design engineer Adam Argondizzo, et al., presented at ICALEO, October 2019.

Aluminum Mirrors with Water-Cooling for High-power Lasers

The ability to water-cool aluminum mirrors allows for lighter-weight processing heads, enabling faster cutting and welding. Aluminum offers a significant reduction in weight and corrosion compared to equivalent copper parts. For 1μm applications, aluminum mirrors can be post-polished to achieve sub-nanometer roughness in fold mirror configurations and deposited with a highly-reflective, dielectric coating for >20 kW power usage.

Features

  • Water-cooling available
  • Compatible with all standard diamond-turning operations
  • Sub-nanometer roughness (plano configurations only)
  • Up to 300mm diameter
  • Additional light-weighting options available
  • Corrosion resistant
Birefringence Crystal
For an optically anisotropic crystal, the refractive index varies linearly with the polarizability in the crystal. So, when the light passes through such crystals, the polarization of the exit light will be different than the polarization of the i... Read More
Micro Lenses
Micro Lenses refer particularly to C-Lens or D-Lens, which widely used for collimating or coupling beams after the fiber. With more than 10 years of experiences of lean production of Micro Lenses, II-VI provide high volume C-Lens or D-Lens with di... Read More
Spherical Lenses
A lens is a curved piece of ground and polished or molded material, usually glass, used for the refraction or focusing of light. II-VI provides lenses a wide range of size and materials including BK7, Fused Silica, CaF2 and other glass types speci... Read More
Magneto-Optic TGG Faraday Rotator Rods
All TGG Faraday rotator materials from IPI are RoHS compliant.
Flat Top Beam Shaper for Visible & 1 µm Laser Wavelengths
Features Wavelength: Visible (blue, green, red) & Fiber (1um) lasers Gaussian input beams with single mode M2 <1.1 for best results. Customizable output beam shapes and sizes. ... Read More
1 Micron Cover Slides
II-VI now offers cover slides for your Fiber and YAG lasers. These optics are also known as cover glass, debris window, debris shield, and protective window and are available in various shapes and sizes. Cover slides can, at a fraction of the cost... Read More
1 Micron High-Power Direct-Diode Laser (HPDDL) Beam Integrators
The 1 micron (0.8 - 1.0 µm) high-power direct-diode laser (HPDDL) is becoming an increasingly popular tool for materials processing, thanks to its small physical size, low initial capital cost, electrical efficiency, and long maintenance interval... Read More
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 achiev... Read More
Sapphire Aspheres for High-power 1μm Laser
II-VI, a global leader in laser optics solutions, introduces aspheric sapphire optics for the high-power 1 micron market. Sapphire is an alternative to fused silica with exceptional material properties for high-power performance, including increas... Read More
Aluminum Mirrors with Water-Cooling for High-power Lasers
The ability to water-cool aluminum mirrors allows for lighter-weight processing heads, enabling faster cutting and welding. Aluminum offers a significant reduction in weight and corrosion compared to equivalent copper parts. For 1μm applications,... Read More
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