UV fused silica window slice

Ultraviolet fused silica window window slice is an optical element with high transmittance in the deep ultraviolet to near infrared band, which is widely used in laser systems, spectral analysis, semiconductor detection, life science instruments and other fields. It uses high-purity synthetic quartz material, which has excellent optical uniformity, extremely low thermal expansion coefficient, and outstanding radiation resistance. It is an indispensable key component in high-end optical systems.

FAQ:

1. What practical problems can UV fused silica window slice solve?  

It can solve the problems of low transmittance, easy fluorescence interference, and insufficient laser damage threshold of ordinary optical materials in the ultraviolet band, ensuring the energy transmission efficiency and signal stability of the ultraviolet light path system.

2. Is it suitable for high-power ultraviolet lasers?  

Yes, it is. Ultraviolet fused silica material has a very high laser damage threshold (>10 J/cm ⊃2; @ 355nm, 10ns) and an extremely low absorption coefficient, which is suitable for nanosecond and picosecond ultraviolet laser processing and detection systems.

3. Can we customize irregular sizes or coatings?  

Okay. We support customization of circular, rectangular, and irregular contours, and provide coating services such as anti reflective film, spectral film, reflective film, etc. 

How about the supply cycle and quality assurance?  

The regular customization cycle takes 5-10 working days, and each window piece comes with an interferometer surface shape detection report and a spectrophotometer transmittance curve to ensure optical performance traceability.

Core application areas of the product

-UV laser processing: used as a laser output window, scanning field mirror protection window, and optical path turning window

-Spectral analysis instrument: used for sample cell windows and optical path sealing windows of UV spectrophotometers, Raman spectrometers, and fluorescence spectrometers

-Semiconductor testing: applied to ultraviolet light transmission components in wafer defect detection equipment and lithography machine lighting systems

-Life Sciences and Medicine: Optical Isolation and Transmission Windows Used in PCR analyzers, Flow Cytometers, and UV Sterilization Equipment

Characteristic advantage explanation

High UV transmittance: The transmittance is>90% in the 193nm-2500nm wavelength range, and the transmittance below 200nm is better than that of ordinary quartz

Extremely low fluorescence characteristics: The impurity content is extremely low (metal impurities<1ppm), and there is almost no background fluorescence interference under UV excitation

Excellent surface shape accuracy: The surface shape can reach λ/10 @ 633nm, with a surface smoothness of 20-10, meeting high-precision imaging requirements

High thermal shock resistance: coefficient of thermal expansion 0.55 × 10 ⁻⁶/K, able to withstand rapid temperature changes without cracking

Radiation resistant stability: Low transmittance attenuation under long-term UV irradiation, suitable for high-intensity UV environments

Customer Application Case (Anonymous)

Case 1: A domestic laser equipment listed company - High power ultraviolet laser output window

Demand

The 20W ultraviolet picosecond laser developed by the customer was found to have film damage and transmittance attenuation in the output window during long-term operation, resulting in laser power fluctuations exceeding ± 5% and affecting cutting accuracy. A higher damage threshold and more stable window scheme need to be replaced.

Solution

We have customized the UV fused silica window slice for customers, which is coated with UV antireflection film on both sides（ AR@355nm ）The membrane layer adopts ion assisted deposition technology, and the laser damage threshold has been tested to reach 12 J/cm ⊃2; (355nm, 10ns). The window profile is controlled at λ/10 to ensure minimal distortion of the transmitted wavefront.

Final effect

After replacement, the laser operates continuously at full power for 1000 hours, with a window transmittance attenuation of less than 0.5% and power fluctuations controlled within ± 1%. The customer has made this solution a standard component for this model of laser.

Case 2: A well-known spectrometer manufacturer in Europe - Fluorescence Spectrometer Sample Cell Window

Demand

When developing a new generation of high-sensitivity fluorescence spectrometer, the customer found that ordinary quartz windows produce weak fluorescence background under UV excitation, which seriously affects the detection signal-to-noise ratio of trace samples. We need to search for window materials with low fluorescence and high ultraviolet transmittance.

Solution

We provide synthetic ultraviolet fused silica window piece, made of Corning 7980 grade high-purity quartz, 2mm thick, polished on both sides to a surface roughness of<0.5nm, and delivered without coating. Each window is accompanied by a 200nm-1100nm transmittance curve and a fluorescence background test report.

Final effect

The fluorescence signal of the window window slice in the excitation band of 250nm-400nm is lower than the background noise of the instrument, and the signal-to-noise ratio of sample detection is improved by about 30%. The customer has included this window window slice in the standard material list of their high-end spectrometer models.

Customized Service Description

We support the full customization of UV fused silica window slice:

Optional range of customization options

Material: Synthetic quartz, natural quartz, doped quartz (can be selected according to needs)

Appearance: circular, rectangular, trapezoidal, irregular contour

Dimensions: Diameter 3mm -300mm, Thickness 0.5mm -50mm

Surface accuracy: λ/4, λ/10, λ/20 @ 633nm

Surface smoothness: 60-40, 40-20, 20-10, 10-5

Coating types: UV anti reflective film, broadband anti reflective film, reflective film, spectral film, bandpass filter film

Chamfering and Edge: Right angle edge, C-angle, R-angle, customizable installation step or flange structure

As the "optical gateway" in the optical system, the quality of ultraviolet fused silica window window slice directly determines the upper performance limit of the whole machine. We adhere to the principle of material purity as the basis, processing accuracy as the guarantee, and testing data as the criterion, providing reliable, traceable, and customizable quartz optical solutions for every customer.

If you need to select ultraviolet fused silica window pieces for your lasers, spectrometers or detection equipment, please provide the use scenarios and technical parameters. We will quickly match the optimal scheme and provide you with accurate quotations. Contact us immediately to get the customized solution of exclusive UV fused silica window slice.

Luverre Quartz manufactures and sells a wide range of high quality quartz glass, including quartz tubes, quartz slices, quartz rods, quartz windows, quartz crucibles, quartz boats, quartz flanges, quartz beakers, quartz glass instruments, and more. We can meet all kinds of customized requirements for quartz glass products.