Reliable Light Guidance at Extreme Temperatures

Optical Fibers for High-Temperature Applications

High-temperature environments push conventional optical fibers to their limits. Thermal stress, temperature cycling, and harsh operating conditions place high demands on material performance and mechanical durability. In plasma processes, power plants, industrial furnaces, and metal processing, optical fibers must deliver reliable performance over extended operating periods.

CeramOptec designs optical fibers for high-temperature applications specifically for these extreme conditions. Aluminum coatings, hermetic carbon layers, and heat-resistant jacket materials protect the fiber and maintain reliable signal quality even during long-term exposure.

Typical Applications

  • Plasma processes & coatings: reliable light transmission under extreme temperatures and radiation exposure
  • Power plants & energy facilities: precise signal delivery for process and safety monitoring
  • Industrial furnaces & combustion processes: stable fibers for the reliable monitoring of melting and burning operations
  • Aerospace: high-performance fiber optic systems for propulsion and structural monitoring

Selection Criteria for Fibers

In high-temperature applications, temperature range, thermal cycling, and environmental conditions determine the appropriate fiber design. Precisely matching the fiber to these parameters ensures stable signal transmission and reliable system performance over extended operating periods.


Key selection parameters:

  • Temperature range: continuous and peak operating temperatures
  • Thermal cycling: impact of heating and cooling processes
  • Material stability: behavior of glass, coatings, and protective materials
  • Mechanical load: relevant for vibration or dynamic applications
  • Environmental conditions: chemical exposure, protective atmospheres, humidity

Suitable Optran® Fibers

CeramOptec offers Optran® fiber types and assemblies designed to withstand elevated thermal loads in high-temperature applications:

  • Optran® WF / WFNS / WFGE
    For VIS and NIR applications requiring stable transmission at elevated temperatures.
  • Optran® UV / UVNS / UVNSS
    For UV applications where temperature resistance must be combined with material purity and aging stability.
  • Special high-temperature assemblies
    Featuring adapted coatings, protective tubing, or metallic solutions for extreme thermal environments and OEM integration.

Explore suitable Optran® fibers for High-Temperature Applications and technical details in our fiber overview.

FAQ – Frequently Asked Questions

We offer high-temperature fibers for extreme conditions, that operate reliably from –196 °C to over +400 °C. They are suitable for both cryogenic applications and high-temperature processes in industry and research.

Yes. With specially selected coatings and materials, our fibers are vacuum-ready and maintain their performance even in challenging environments found in industrial or research applications.

We offer a wide range of coatings for use under extreme heat, including aluminum and hermetic carbon coatings, as well as customer-specific options. These ensure stability and protection even under the harshest conditions.

Yes. Our fibers are engineered for long-term stability and withstand continuous thermal and mechanical stress. This makes them ideal for applications where maximum reliability is required over many operating hours.

Absolutely. We deliver tailored assemblies including special connectors, protective jacketing and optional validation documentation. This ensures your solution integrates seamlessly into your OEM systems.