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Optical Fiber

TOP® Aluminium-coated Quartz FiberTOP® Aluminium-coated Quartz Fiber

TOP® Aluminium-coated Quartz Fiber

TOPRAYS aluminium-coated silica fiber is the first choice for applications demanding the highest reliability under high temperature, high vacuum and other extreme conditions. These fibers are designed for situations where conventional polymer-coated fiber cannot perform, maintaining stable optical performance even in demanding industrial, scientific and aerospace environments. The aluminium coating delivers efficient thermal management while ensuring long-term durability in applications involving high temperature, radiation or aggressive sterilisation processes.

These aluminium-coated fibers retain all the inherent advantages of standard silica/silica fiber, including excellent optical transparency, low attenuation and chemical inertness. At the same time the metal coating significantly improves mechanical strength and fatigue resistance, better withstanding microbending, vibration and repeated mechanical stress.

These fibers offer a broad optical transmission range from 220 to 2400 nm and support a wide variety of applications depending on the UV or NIR silica core selected, suiting spectroscopy, sensing, medical and industrial laser systems. Notably, they maintain stable performance across an extreme temperature range from as low as -270 °C up to continuous operation at 450 °C.

Technical Parameters

ParameterSpecified value
Transmission Range220 – 2400 nm
Operating Temperature-270 to +450 °C
Standard Numerical Aperture0.22 ± 0.02
Humidity RangeUp to 100%

Standard Aluminium-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: 2.5 – 9; multimode: 50; 62.5; 100; 200; 400; 600; 800; 1000
Aluminium Coating Thickness, µm15 – 150 (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, °C450
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