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Optical Fiber

TOP® Copper-coated Quartz FiberTOP® Copper-coated Quartz Fiber

TOP® Copper-coated Quartz Fiber

TOPRAYS copper-alloy-coated silica fiber represents the state of the art for extreme-condition applications, including very high temperature, high vacuum and demanding operating environments. Designed for situations where conventional fiber solutions fall short, it combines excellent optical stability with strong thermal and mechanical performance, making it ideal for industrial, scientific and aerospace applications.

These copper-alloy-coated fibers retain all the key advantages of conventional silica/silica fiber. In addition, compared with polymer-coated fiber the metal coating significantly improves mechanical strength and durability and enhances resistance to fatigue and mechanical stress.

Depending on the UV or NIR silica core selected, the optical transmission range spans 220 to 2400 nm, supporting a wide range of optical and spectroscopic applications. Notably, these fibers maintain reliable performance across an extreme temperature range from as low as -270 °C up to continuous operation at 600 °C, and withstand humidity of up to 100% without compromising optical or mechanical integrity.

Technical Parameters

ParameterSpecified value
Transmission Range220 – 2400 nm
Operating Temperature-270 to +600 °C
Standard Numerical Aperture0.22 ± 0.02
Humidity RangeUp to 100%

Standard Copper-coated Fiber Specifications

ParameterSpecified value
Core/Cladding Material (step index)Pure fused silica core / fluorine-doped silica cladding
Graded indexGermanium-doped fused silica core / pure fused silica
Core Diameter, µmSingle-mode: 4 – 9; multimode: 50; 62.5; 100; 200; 400; 600; 800; 1000
Copper-alloy Coating Thickness, µm15 – 50 (depending on fiber diameter)
Standard Numerical Aperture (NA)0.22 ± 0.02
Optional Numerical Aperture (NA)0.12 ± 0.02 | 0.26 ± 0.02
Minimum Operating Temperature, °C-270
Maximum Operating Temperature, °C600
Humidity RangeUp to 100%
Minimum Bend Radius (long term)200 × fiber outer diameter
Minimum Bend Radius (short term)100 × fiber outer diameter
Tensile Strength (short gauge), GPa3.5 – 6
Two-point Bend Strength, GPa> 10
Static Fatigue Parameter> 100

Attenuation

Attenuation