Fluorine-Doped Fused Silica Tubes FST for Special Fiber Production

Specifications

Fluorine Concentration: 4 wt %
Refractive Index Delta: (17 ±3) × 10⁻³
Numerical Aperture (NA): up to 0.22
OH Content: <20 ppm
Refractive Index At 633 Nm: 1.440
Refractive Index At 1064 Nm: 1.433
Thermal Expansion Coefficient: 2.5×10⁻⁷ K⁻¹
Density: 2.180 g/cm³
Inner Tube Ø (I.D.): 20 – 40 mm
Fluorine Doped Wall Thickness: 1.5 – 15 mm
Tube Length: max. 1000 mm
Non-circularity: ≤ 3 %
Deflection: ≤ 1.5 mm/m
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Features


  • Material Quality: Tubes made of ultrapure fused silica, ideal for producing special fibers, preforms, and optical components.

  • Versatile Applications: Suitable for industrial and medical applications when drawn as capillaries. Special doped versions support high-power laser transmission and are perfect for manufacturing photonic crystal fibers.

  • Customizable Designs: Available in different sizes and dopings, including customer-specific undoped fused silica tubes with low OH content, and fluorine-doped tubes with high concentrations.

  • Innovative Solutions: Ideal for individual preform designs and manufacturing innovative special fibers.

  • Fluorine-Doped Tubes: Developed for special fiber manufacturers, these tubes have high fluorine concentrations (up to 4 wt.%) and a negative refraction index delta of (17 ±3) × 10-3.

  • High Performance: Offers numerical apertures (NA) of up to 0.22 and low OH content (<20 ppm) for easy finishing and processing in preforms or capillaries.

  • Customer-Specific Variations: Custom preforms can be produced with single-level or multi-level refractive index profiles.

Applications


  • Drawn as capillary: Ideal for industrial and medical applications.

  • Special doped versions: Supports the manufacturing of combiners in high-power laser transmission.

  • Photonic crystal fibers: Perfect tube material for manufacturing these fibers.

  • Substrate or jacketing tubes: Developed for the production of special fiber designs.

  • CVD processes: Used as substrate materials.

  • Overcladding processes: Essential for preform production.

  • Fluorine-doped capillary: Utilized for special fiber designs.