GR-S50/125-20P & GR-S50/125-20MTA Graded-Index Pure-Silica-Core Multimode Fiber GR-S50/125- 20MTA
Coherent/Nufern NuSENSOR pure-silicon-core multimode fibers resist damage from hydrogen ingression, supporting Raman-scattering-based distributed temperature sensing in harsh environments. They use a graded-index core design with NA=0.20, a 50um core diameter, and a 125um cladding diameter. Polyimide coatings or hermetic carbon/polyimide coatings are available. NuSENSOR multimode fibers are designed and manufactured entirely in-house at Nufern. All processing stages are monitored and controlled to provide high operating bandwidth and low transmission loss. Like other Nufern fibers, these multimode fibers have strict optical specifications and geometric tolerances, with specifications at key wavelengths tested. Even at high hydrogen partial pressures and temperatures up to 300 degrees, NuSENSOR pure-silicon-core graded-index multimode fibers show virtually no measurable environmentally induced attenuation in typical sensing applications.
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Overview
Specifications
| Parameter | Value |
|---|---|
| Operating Wavelength | 850-1300 nm |
| Bandwidth (@850nm) [@850nm；@850nm）] | >300 MHz-km |
| Bandwidth (@1300nm) [@1300nm；@1300nm）] | >300 MHz-km |
| Core Numerical Aperture | 0.200 |
| Cladding Diameter | 125.0±2.0 μm |
| Core Attenuation @1300nm | ≤1.00 dB/km |
| Core Attenuation @1060nm | ≤1.80 dB/km |
| Core Attenuation @850nm | ≤2.70 dB/km |
| Core Diameter | 50.0±2.5 μm |
| Coating Diameter | 245.0±5.0 μm |
| Core Noncircularity | ≤5 % |
| Cladding Noncircularity | ≤1 % |
| Core Refractive Index Profile | Graded-Index Type |
| Coating Material | Medium-Temperature UV Curing, Dual Acrylate |
| Operating Temperature | -40 ~ +150 ℃ |
| Proof Test Level | ≥100 (0.7GN/m²) |
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Key Features
Datasheet
Supplier Information
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