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Frequently Asked Questions

Each preform is produced with the suited technology: Step 1 - choice of the appropriate core material, either from their raw material production of undoped fused silica with high or low OH content or by direct coating of doped fused silica. Step 2 - Production of the final waveguide preform, either their own MCVD process (inner coating) for graded-index and step-index fibers or a PBVD process (outer coating) for large core step-index fibers.

The performance properties of the 50/125 and 62.5/125 preforms include core composition of SiO2/GeO2, refractive index profile nearly parabolic, refractive index delta of 13.7 × 10–3 and 25.9 × 10–3 respectively, tolerance of Delta within a rod of 2.0 × 10–3 and 3.0 × 10–3 respectively, and numerical aperture of 0.200 ±0.015 and 0.275 ±0.015 respectively.

FiberTech Multimode Preforms are high-quality preforms made of highly pure fused silica materials that are used as the basis for the manufacturing and application of high-performance special fibers and standard fibers.

The acceptable number of bubbles per preform in the core is not allowed for s > 2.0, 0 for s ≤ 0.3, 5 for 0.3 < s ≤ 0.8, and 2 for 0.8 < s ≤ 2.0. There should be no bubbles in the cladding.

LEONI offers graded-index preforms for high-performance multimode fibers in the 50/125 and 62.5/125 designs.

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