There are many kinds of optical fiber, but we choose silica fiber only, because this kind of fiber have the lowest loss when conducting light. The fiber is consist of two layers of silica glass that have different refractive index. The inner layer is light core with a diameter of several μm to more than ten μm, while the outer layer has a diameter of 0.1 to 0.2 mm. Generally, the refractive index of inner layer surpass the outer layer for about 1%. According to the principle of reflection, when the incidence angle to the interface of inner and outer layer is bigger than the critical angle of total reflection, the light will be totally reflected back. So that, the light keep moving in the fiber until reaching the outlet.Fibre Type HPCF 1000/1100-37-1400/E Part No. HP2142-A Optical Properties Numerical Aperture 0.37±0.02 Attenuation @850nm ≤8.0dB/Km OH content Low OH Refractive Index Profile Step Index Geometrical Properties Core Diameter 1000±20μm Polymer Cladding Diameter 1100±30μm Coating Diameter 1400±50μm Core/Cladding Offset ≤10μm Fibre Material Composition Core Pure Silica Cladding Fluoroacrylate Buffer ETFE Operating Temperature -65/+125°C Environmental and Mechanical Property Short Term Bend Radius ≥75mm Long Term Bend Radius ≥120mm Proof Test Level ≥75kpsi(0.517GPa) Cable Specification Central Strength Member Material FRP Central Strength Diameter 1.6mm Waterproof Material Waterproof Yarns Ripcord 1 Armouring Material 0.05mm Aluminium Tape Outer Jacket Material TPE Outer Jacket Thickness Normal: 1.0mm Cable Diameter Approx. 7.5±0.5mm Strength(Long/Short/ Term) 200N/500N Crush Resistance(Long/Short Term) 100N/200N Operating Temperature -40/+70 Cable Weight Approx. 64Kg/Km
