Smart Product Number: GR-S50/125-20P
NuSENSOR 50/125 Graded Index Pure Silica Core Multimode Fiber
Nufern's NuSENSOR pure silica core multimode fiber is immune to the damaging effects of hydrogen ingression, enabling Raman based distributed temperature sensing in harsh environments. This 0.20 NA fiber features a graded refractive index profile with a 50 μm core diameter and a 125 μm clad diameter. The fibers are available with a polyimide or mid-temperature acrylate coating and also available in combination with a hermetic carbon coating. NuSENSOR multimode fiber is manufactured in-house, and every process step is monitored and controlled providing high bandwidth and low attenuation. As with all Nufern fibers, this multimode fiber provides tight tolerance optical and geometrical specifications measured at the application critical wavelengths. For high H2 partial pressure and elevated temperature up to 300°C (150°C for MTA) you will find no measurable induced loss for typical sensing applications.
Optical Specifications
Operating Wavelength
850 – 1300 nm
Core NA
0.200
Bandwidth
≥ 300 MHz-km @ 850 nm
≥ 300 MHz-km @ 1300 nmCore Attenuation
≤ 1.00 dB/km @ 1300 nm
≤ 1.80 dB/km @ 1060 nm
≤ 2.70 dB/km @ 850 nm
Geometrical & Mechanical Specifications
Cladding Diameter
125.0 ± 1.0 µm
Core Diameter
50.0 ± 2.5 µm
Coating Diameter
150.0 ± 5.0 µm
Coating Concentricity
< 1.5 µm
Core/Clad Offset
≤ 1.50 μm
Core Non-Circularity
≤ 5 %
Clad Non-Circularity
≤ 1.0 %
Core Index Profile
Graded Index
Coating Material
Polyimide
Operating Temperature Range
-65 to 300 °C
Prooftest Level
≥ 100 kpsi (0.7 GN/m²)
Comments
Coating Requirements: Thermally-cured, polyimide coating.
Other Requirements: Attenuation measured on a loose coil. Coating-clad concentricity <1.5µm is equivalent to (Min Wall/Max Wall) >80%.
Special Core Dopants: Pure Silica Core.
Step or Graded Index: Graded Index Profile.
Features & Benefits
Resistant to H2 ingression — Low cost, long life deployment
Exceptional uniformity — Consistent and repeatable performance
Long unattended deployments or short cycle in-out applications
Low loss over the wavelengths range critical to DTS
Available with hermetic carbon coating
Typical Applications
Enhanced oil recovery processes
Hydrothermal well temperature measurements
Oil reservoir optimization
Raman distributed temperature sensing
商品属性 [波长] 850 - 1300 nm [掺杂类型] Ge [芯径大小] 50 µm [首包层直径] 125 µm [数值孔径] 0.200 [光学包层] Single