Fused Silica windows

Fused Silica window

Fused silica is highly transparent to ultraviolet (UV), visible, and near-infrared (NIR) wavelengths, making it suitable for a wide range of optical applications.

Our company can manufacture windows in various shapes and sizes, also including flat, plano-convex, plano-concave, or cylindrical, depending on their intended use. Here is a standard examples of manufacturing:

Fused Silica Windows
Uncoated and AR-Coated Versions Available
Available Diameter (inch) Thickness (mm)
1/2‘’ 3,0
1/2‘’ 6,0
1‘’ 1,0
1‘’ 2,0
1‘’ 5,0
1‘’ 6,0
2‘’ 3,0
2‘’ 5,0
2‘’ 12,0

Applications:

  1. Laser Systems: Fused silica windows are used as protective windows or beam splitters in laser systems. They are transparent to laser wavelengths and can withstand high laser power levels without significant damage.
  2. Optical Instruments: They are used in optical instruments such as spectrophotometers, microscopes, and telescopes as windows or lenses. Fused silica’s excellent optical properties make it ideal for transmitting light with minimal absorption or scattering.
  3. Semiconductor Industry: Fused silica windows are used in semiconductor manufacturing equipment for processes such as photolithography and wafer inspection. They provide a transparent barrier between the process chamber and the external environment.
  4. Spacecraft and Aerospace: Fused silica windows are used in spacecraft and aerospace applications for optical communication, remote sensing, and scientific instrumentation. They offer high optical quality, thermal stability, and resistance to radiation.
Size Tolerance +0.0 / – 0.2mm
Thickness Tolerance + / – 0.1mm
Wavelength Range (Uncoated) 185 nm – 2.1 μm
AR Coating Range 245-400 ; 350 – 700 nm
Clear Aperture >85%
Parallelism 5 arc min
Bevel available

Advantages:

  1. High Transmission: Fused silica windows have high optical transparency across a broad spectral range, including UV, visible, and NIR wavelengths.
  2. Thermal Stability: Fused silica has a low coefficient of thermal expansion, making it highly resistant to thermal shock and temperature fluctuations.
  3. Chemical Inertness: Fused silica is chemically inert and resistant to most acids, bases, and other corrosive chemicals.
  4. Mechanical Strength: Fused silica windows are mechanically robust and can withstand mechanical stress and handling without fracturing or breaking easily.
  5. Low Fluorescence: Fused silica has low fluorescence levels, making it suitable for applications requiring minimal background noise, such as spectroscopy and fluorescence microscopy.

YREMOptics manufactures Fused silica windows using a flame fusion process or chemical vapor deposition (CVD). In flame fusion, high-purity silica powder is melted in a furnace and then shaped into a desired form using molds or machining. In CVD, silica is deposited onto a substrate using chemical reactions in a high-temperature environment. Both methods result in high-quality fused silica windows with excellent optical and mechanical properties.