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Description

Optran® UVNSS optical fibers are multimode all-silica fibers with a fluorine-doped cladding, and an integrated hermetic carbon layer. The fiber is designed for stable light transmission in the UV-VIS range from 190 to 700 nm.

Compared to standard UV fiber types, UVNSS fibers with hermetic carbon layer are specifically stabilized to extend lifetime under harsh UV or gamma radiation. The carbon layer acts as a barrier against gaseous species and is applied between cladding and outer coating without altering the fundamental optical guidance mechanism.

The fiber is based on a high-OH silica composition, supporting transmission at shorter UV wavelengths. The stabilization process includes additional manufacturing steps and testing to ensure consistent performance under demanding environmental conditions.

Optran® UVNSS fibers are used in applications where long-term stability, resistance to solarization, and controlled transmission behavior in the UV range are required.

For extended spectral range towards VIS-NIR, see Optran® UVWFS fibers.





 

Optran® UVNSS – Solarization-Resistant High-OH Fiber (190–700 nm)

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Specifications

Wavelength Range: 190 – 700 nm
Fiber Core Material: Silica
Core Diameter: 100–600 μm
Numerical Aperture (NA): 0.12 ± 0.02 | 0.22 ± 0.02 | 0.28 ± 0.02 or customized
Operating Temperature: -190 to +150°C
Standard Core / Cladding Ratios: 1 : 1.06 | 1 : 1.1 | 1 : 1.2 | 1 : 1.4 or customized

Got questions about specs? Use the inquiry form to ask.

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Features

  • Numerical Aperture (NA):
    • Low: 0.12 ± 0.02
    • Standard: 0.22 ± 0.02
    • High: 0.28 ± 0.02
    • Custom options available
  • Operating Temperature: -190 to +150°C (hermetic layer stability limit)
  • Core Diameter: 100 to 600 μm
  • Standard Core/Cladding Ratios: 1:1.06, 1:1.1, 1:1.2, 1:1.4 or customized
  • OH Content: High (> 700 ppm)
  • Standard Prooftest: 70 kpsi (polyimide jacket)
  • Minimum Bending Radius:
    • 50 × cladding diameter (short-term mechanical stress)
    • 300 × core diameter (during use with high laser power)

Applications

  • Spectroscopy: Ideal for precise measurement and analysis of light spectra.
  • Semiconductor Technology: Suitable for use in semiconductor manufacturing and processing.
  • Laser Delivery Systems: Efficiently transmits laser light for various applications.
  • High Solarization Resistance: Maintains performance under prolonged UV exposure.
  • Custom Applications: Versatile for a wide range of custom optical fiber needs.

Frequently Asked Questions

What is the function of the hermetic carbon layer?
The hermetic carbon layer acts as a barrier against gaseous species, such as hydrogen, which can influence fiber performance over time. In combination with the stabilization process, it supports extended lifetime under harsh UV or gamma radiation conditions.
How does Optran® UVNSS differ from Optran® UVNS?
Optran® UVNSS fibers include an additional hermetic carbon layer and undergo a stabilization process during manufacturing. This combination is designed to extend lifetime under harsh UV or gamma radiation compared to standard UVNS fibers, which do not include this structure.
Does the carbon layer affect optical transmission?
The hermetic carbon layer is applied between the cladding and the outer coating and does not alter the fundamental light-guiding mechanism of the fiber. The optical transmission behavior is primarily defined by the core and cladding design.
When should Optran® UVNSS be selected?
Optran® UVNSS is typically selected for applications requiring extended lifetime under high UV exposure or radiation environments, or where protection against gaseous species is relevant for long-term stability.
Does Optran® UVNSS eliminate UV-induced degradation completely?
Optran® UVNSS fibers are designed to reduce degradation effects and extend operational lifetime under UV exposure, but do not eliminate them completely. Performance depends on the specific operating conditions, including wavelength, power level, and environment.
What happens if the fiber is exposed to elevated temperatures?
At elevated temperatures (approximately above 150 °C), the hermetic carbon layer may gradually lose its barrier properties, allowing hydrogen to diffuse out. In this case, the fiber behavior approaches that of a standard UVNS fiber with reduced resistance to solarization.

Got more questions? Use the inquiry form to ask the supplier directly.

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