Optical Fused Silica Glass Laser Protective Window

Name: Optical Fused Silica Glass Laser Protective Window
Brand: Henan UM Optics Ltd
Availability: InStock

Description

Henan UM Optics Ltd., a factory-direct optical component manufacturer, offers premium laser-grade fused silica protective windows—engineered to withstand high-power laser irradiation while maintaining exceptional optical performance. Crafted from high-purity synthetic fused silica , these windows feature ultra-low optical absorption, high damage threshold, and superior thermal stability, making them ideal for safeguarding sensitive optical components in laser systems.

Specifications

Substrate Material:	Fused Silica
Antireflection Coating:	Coated
Diameter:	20 mm
Surface Quality:	60-40 scratch-dig
Surface Flatness:	lambda/4
Thickness:	2 mm

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Features

Ultra-High Laser Damage Threshold: ≥10 J/cm² (1064 nm, 10 ns pulses) for uncoated windows; up to 20 J/cm² with laser-hardened AR coatings—resistant to laser-induced damage in high-power systems
Low Optical Absorption: <0.01%/cm at 1064 nm, minimizing light loss and thermal lensing effects in laser beams
Exceptional Thermal Stability: Fused silica’s low thermal expansion coefficient (0.55 × 10⁻⁶/°C) and high melting point (1710°C) prevent deformation under extreme laser heating
High Purity & Homogeneity: Synthetic fused silica material ensures minimal inclusions and bubbles, avoiding beam distortion or scatter

Applications

Industrial Laser Systems: Protect lenses, mirrors, and detectors in fiber lasers (1064 nm), CO₂ lasers (10.6 μm), and ultrafast lasers (fs/ps) used for cutting, welding, and engraving
Medical Laser Devices: Safeguard optical components in dermatology lasers (e.g., tattoo removal, hair removal), ophthalmic lasers, and surgical laser systems (532 nm/1064 nm wavelengths)
Aerospace & Defense: Used in laser rangefinders, directed energy systems, and satellite laser communication (lasercom) to shield optics from harsh environmental conditions (vibration, dust, moisture)
Scientific Research: Employed in laser spectroscopy, fusion research, and high-energy physics experiments (e.g., UV excimer lasers at 193 nm) requiring ultra-high optical performance
Semiconductor Manufacturing: Protect lithography tools and laser annealing systems from debris and contamination during wafer processing

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Frequently Asked Questions

Can you customize coatings for specific laser wavelengths (e.g., 193 nm excimer, 266 nm UV)?

Yes. We offer custom AR coatings optimized for UV (193 nm/266 nm), VIS (532 nm), and NIR (1064 nm/1550 nm) laser wavelengths, reducing reflection losses to

How to select the right thickness for a fused silica protective window?

Thickness depends on laser power and application: thin windows (0.5–2 mm) suit low-power medical lasers (weight/cost optimization), while thick windows (5–20 mm) are ideal for high-power industrial lasers (thermal stability and mechanical strength).

What sets laser-grade fused silica apart from standard fused silica for protective windows?

Laser-grade fused silica is manufactured with ultra-high purity and strict control over impurities , resulting in lower absorption and higher laser damage threshold—critical for high-power laser applications. Standard fused silica may contain impurities that cause laser-induced damage or beam degradation.

How do you ensure the windows withstand high-power ultrafast lasers (fs/ps pulses)?

Our laser-grade fused silica has minimal surface defects and we use low-absorption bonding techniques for coatings. We test each window for ultrafast laser damage threshold (≥1 J/cm² for 100 fs pulses) and offer edge rounding to prevent stress concentration—key for withstanding ultrafast laser intensity.

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