Optical Fiber
TOP® Metal-coated Quartz FiberTOP® Metal-coated Quartz Fiber
TOP® metal-coated quartz fibers are available with tin, copper, aluminium and carbon-underlayer aluminium coatings. They withstand the highest temperatures of all fiber types and suit harsh environments.
Wavelength · Numerical Aperture (NA)
| Wavelength | Numerical Aperture (NA) |
|---|---|
| TOP® UV 190 – 1200 nm · TOP® NIR 300 – 2400 nm | Low 0.12 ± 0.02 | 0.15 ± 0.02 · Standard 0.22 ± 0.02 · High 0.26 ± 0.02 | 0.28 ± 0.02 |
Advantages
Suitable for all fiber types
Outstanding high-temperature performance
Excellent resistance to highly corrosive chemicals
Solderable for easy integration
Hermetic sealing for greater durability
Construction
Silica glass core · fluorine-doped silica cladding · metal coating
Metal Coating Options
| Coating | Operating Temperature |
|---|---|
| Tin | Up to 230 °C |
| Copper (Cu) | -270 to +600 °C * |
| Aluminium (Al) | -270 to +400 °C |
* With a Cu + Ni dual-layer coating the temperature rating reaches 750 °C
Technical Parameters
| Parameter | Specified value |
|---|---|
| Operating Temperature | -270 to +600 °C |
| Core Diameter | Available from 25 to 2000 µm |
| Coating Thickness, µm | Tin: 15 to 50 | Copper: 15 to 50 | Aluminium: 15 to 150 |
| Tensile Strength (short gauge), GPa | Tin: 6 to 9 | Copper: 2 to 3 | Aluminium: 3.5 to 6 |
| Two-point Bend Strength, GPa | Tin: > 10 | Copper: > 10 | Aluminium: > 10 |
| Static Fatigue Parameter n | Tin: > 100 | Copper: > 100 | Aluminium: > 100 |
| Minimum Bend Radius | 100 × diameter (short-term mechanical stress) · 200 × diameter (high-power laser use) |
