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DG Quartz Capillaries

DG Quartz Capillaries are essential for optical communication, crafted from high-purity quartz. They feature precise inner diameter accuracy (ID±0.001mm) and spacing (S±0.002mm), ensuring high dimensional positioning accuracy, outstanding physical and chemical properties, and excellent ultraviolet transmission. These capillaries can hold two optical fibers side by side for accurate positioning. The fibers can be quickly bonded with UV adhesive, leveraging the capillary’s fiber-like polishing properties for the required optical polishing surface. They’re ideal for use in optical connectors, fiber optic connectors, and couplers.

dg quartz capillaries

Specifications of DG Quartz Capillaries

DG Quartz Capillaries Product parameter table
ProjectIndicator Pequirements
Material PropertiesMaterial: Quartz, silicon dioxide (SiO2) content >99.99%
Density: 2.2×10³Kg/m³ Thermal expansion coefficient: 5.5×10-7cm/cm℃
Compressive Strength: 4.8×107Pa (N/m²) (7000psi)
Tensile Strength: >1.1×109Pa (160000psi)
Softening Point: 1683℃ Annealing point: 1215℃ Deformation Point: 1120℃
Refractive index: 1.4585
Dielectric Constant: 3.75 (@1MHz) Insulation strength: 5×107V/m
Dimensional AccuracyOuter Diameter: Φ1.00mm, Φ1.80mm, Φ2.00mm, Φ2.50mm Outer Diameter Tolerance: OD±0.005mm, customized according to customer requirements
Inner Hole Size:
Inner Hole Diameter ID: 0.051, 0.081, 0.127
Inner Hole Tolerance ID: ±0.001mm
Spacing size S: 0.102, 0.162, 0.128, 0.134, 0.138
Spacing S: ±0.002mm
The inner hole size and spacing size can be customized according to customer requirements.

Length: 5mm, 7mm, 15mm, 20mm                       

Length Tolerance: L±0.2mm, or customized according to customer requirements

Taper Hole Diameter: Φ0.5±0.15mm, Φ1±0.25mm, or customized according to customer requirements
Taper Hole Depth: 0.5~1.5mm, 1~2.5mm, or customized according to customer requirements
Center Hole Position: 0.008mm
Surface RequirementsThe cylindrical surface of the product is transparent and has no cracks. The appearance and surface condition meet customer requirements.
Can be customized according to customer requirements.

Dimension Drawing of DG Quartz Capillaries

Dimension Drawing of DG Quartz Capillaries

Features of DG Quartz Capillaries

Features of DG Quartz Capillaries
  • Material: high-purity fused quartz, silicon dioxide (SiO2) content >99.99%, softening point >1650°C, high strength, high wear resistance, high light transmittance.

  • Usage properties: The quartz capillary tube is melted and drawn at high temperature. The surface is transparent, which eliminates local hidden micro-cracks on the surface. It is not easy to crack and break when dispensing glue to fix the optical fiber, and the dispensing qualification rate is high.

  • The quartz capillary is transparent and has high UV transmission characteristics. The capillary and two optical fibers can be quickly cured and bonded with UV adhesive to fix and position the optical fibers.

  • Environmental properties: The production process does not use any chemical solvents, and the materials and production process do not contain or involve substances controlled by the European Union.

  • High dimensional accuracy: The double microhole quartz capillary tube is accurately made through a CNC drawing tower. The optical fiber has high dimensional tolerance and positioning accuracy. The double capillary holes can install two optical fibers for precise positioning, and can precisely control the center distance between the two optical fibers.

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