Optical Fiber
TOP® NIR-Ge Germanium-doped Quartz FiberTOP® NIR-Ge Germanium-doped Quartz Fiber
TOPRAYS' TOP® NIR-Ge fiber stands out with an extremely high numerical aperture, outstanding performance and a broad spectral range. The series offers a choice of core diameters and customizable solutions tailored to your specific needs.
Wavelength · Numerical Aperture (NA)
| Wavelength | Numerical Aperture (NA) |
|---|---|
| TOP® NIR-Ge 400 – 2600 nm | Standard 0.37 ± 0.02 |
Advantages
Germanium-doped silica glass core
High laser damage resistance
Step-index profile
Special jackets available for high-temperature, high-vacuum and highly corrosive chemical environments
Very low NA spread
Biocompatible materials
Can be sterilised with ethylene oxide (ETO) and similar methods
Construction
Germanium-doped silica glass core · fluorine-doped silica cladding · buffer layer (where applicable: silicone, hard polymer) · jacket
Jacket Options
| Jacket | Operating Temperature |
|---|---|
| Polyimide | -190 to +350 °C |
| ETFE（Tefzel®） | -40 to +150 °C |
| Nylon | -40 to +100 °C |
| Acrylate | -40 to +85 °C |
| DuPont Hytrel® 7246 | -40 to +140 °C |
| Acrylate DeSolite® DF-0009 | -40 to +150 °C |
| PFA Fluon® | -200 to +260 °C |
Technical Parameters
| Parameter | Specified value |
|---|---|
| Operating Temperature | -200 to +350 °C |
| Core Diameter | Available from 20 to 1000 µm |
| Standard Core/Cladding Ratio | 1 : 1.04 | 1 : 1.06 | 1 : 1.1 | 1 : 1.15 | 1 : 1.2 | 1 : 1.25 | 1 : 1.4 or customised |
| Standard Proof Test | 100 kpsi (nylon, ETFE, acrylate jackets) | 70 kpsi (polyimide jacket) |
| Minimum Bend Radius | 50 × cladding diameter (short-term mechanical stress) · 150 × core diameter (high-power laser use) |
