Special fibers for high-temperature applications

Singlemode and multimode fibers for data communications or light transmission at high temperatures

For use in higher temperature ranges, all optical fibers based on Fused Silica can be optionally equipped with heat-resistant coating materials. This extends the potential field of application to a range from −190 °C to +385 °C.

Your advantages at a glance

  • Multiple coating and buffer materials are available, depending on the application
  • Customer-specific fiber designs
  • Broad temperature spectrum
  • Mechanical strength and stability
  • Resistance to chemicals and other media
  • Autoclavable

Range of products and services

Product portfolio

  • Singlemode fibers
  • Multimode fibers for data communications 50/125, 62.5/125
  • Large-core fibers for beam transmission
  • High-temperature coatings
    • High-temperature acrylate
    • Silicone
    • Polyimide
  • Optional ETFE buffer material

Application temperatures

  • −40 °C to +150 °C high-temperature acrylate
  • −40 °C to +180 °C silicone
  • −190 °C to +385 °C polyimide
  • <+150 °C ETFE

Ordering options

  • Fiber type
  • Fiber coating
  • Optional buffering/extruded
  • Optionally assembled as cable or fiber bundle

More products



Please contact us for further information. We look forward to your inquiry.

Europe, Africa, and Asia (excl. China)
Phone +49 36764-81-100
Email fiber-optics@leoni.com

Phone +86 519-8988-7783
Email fo-china@leoni.com 

North and South America
Phone +1 757-258-4805
Email fo-americas@leoni.com

Sales network

Contact form

Ultra high-temperature jacket (UHTJ)

Ultra high-temperature jacket (UHTJ)

for polyimide (PI) coated fibers


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