Thick Precision Fused Silica Plano-Plano Laser Window – 100mm Diameter

Premium thick plano-plano parallel window / partial reflector on fused silica substrate – excellent surplus lab optic for high-power laser applications or demanding viewport applications.

One side dielectric coated – high reflectivity optimized for laser wavelengths IR/CO2 at 10.6 μm, with partial reflectivity and transmission in visible for alignment or beam sampling, reverse side uncoated polished.

Orientation Note: For optimal performance at normal incidence (perpendicular to beam), orient the dielectric coated side toward the incoming light source – this maximizes reflectivity and minimizes loss for high-power or reflective use.

Key Specifications:

• Diameter: 100 mm

• Thickness: 15 mm (superior parallelism and rigidity)

• Substrate: Fused silica (UV-grade – pale translucent edge, low thermal expansion, deep UV to NIR transmission)

• Coating: Dielectric high-reflectivity on one side, uncoated on reverse (optimized for CO2/IR wavelengths, partial R/T in visible), uncoated on reverse

• Clear Aperture: >90% (full diameter usable)

• Condition: Excellent surplus – pristine surfaces within clear aperture

The substantial thickness and specialized dielectric coating make this ideal for stable performance in high-energy CO2 laser beam paths at normal incidence , with visible partial transmission allowing easy alignment or monitoring.

Applications:

• High-power CO2 laser window or partial reflector (10.6 μm optimized – coated side for maximum reflectivity) Also good for Nd:YAG, or diode systems – coated side toward source for maximum reflectivity

• Vacuum chamber or pressure vessel viewport (thick design withstands differentials)

• IR spectroscopy or semiconductor processes

• Precision spacer or beam sampler in optical systems

• Custom experiments needing IR high-R with visible utility at normal incidence

Thick fused silica optics with CO2-optimized dielectric coating are uncommon surplus – professional-grade durability for critical IR laser setups, with added visible alignment capability– professional-grade durability for critical setups.