Dual-Burners VAD Deposition Equipment
The Dual-Burners VAD Deposition Equipment is a vertical vapor axial deposition system designed for the production of high-purity quartz soot preforms for optical fiber manufacturing. It enables stable axial growth, precise process control, and high deposition efficiency for industrial-scale applications.
The dual-burner configuration allows independent control of flame and thermal conditions, improving process stability and ensuring uniform preform geometry during long-duration deposition.
The system is optimized for large-size preform fabrication with strict control of material purity and structural consistency, featuring:
Stable axial deposition
Precise thermal and gas control
High resistance to corrosion and contamination
The Dual-Burners VAD Deposition Equipment operates based on the Vapor Axial Deposition process, in which silicon-based precursor gases react in a high-temperature flame to form fine silica soot particles. These particles are continuously deposited along the axial direction to form a growing soot preform.
The dual-burner design enables separate optimization of deposition efficiency and thermal stability. One burner focuses on soot generation and deposition, while the second burner stabilizes the thermal field, improving axial growth consistency and reducing process fluctuations.
The process chamber is manufactured from aerospace-grade pure titanium, providing excellent corrosion resistance when handling reactive gases such as chlorine. This material selection significantly enhances process cleanliness and long-term operational stability.
The vertical multi-tier frame structure ensures mechanical rigidity throughout the entire deposition process. The fully sealed tower design minimizes external contamination and provides a controlled environment for high-purity quartz fabrication.
The system is designed for continuous operation and can be integrated with downstream processes such as sintering and preform consolidation, forming a complete and efficient quartz preform manufacturing workflow.
Soot Preform
Length: ~2000 mm
Diameter: ~280 mm
Density: 0.3–0.6 g/cm³
Process Performance
Deposition Efficiency: ~20 g/min
Capture Efficiency: ~50%
Process Chamber
Chamber Material: Aerospace-grade pure titanium
Inner Cavity Diameter: ~320 mm
Maximum Production Temperature: up to 1600°C
Process Configuration
Process Chamber: Single chamber
Heating Zone: Single zone
Process Gases: Cl₂, He, O₂
Control System
Control Mode: PID control
Power and temperature control
Mechanical Structure
Frame Structure: Multi-tiered frame
Total Frame Height: ~11–13 m
Total Weight: ~5.2–13 tons
Cross-sectional Dimensions: ~2.7 m × 1.75 m
Tower Configuration: Fully sealed with steel plates
Independent burner control enables stable soot deposition and optimized thermal profiles throughout the axial growth process.
Pure titanium chamber and fully sealed structure ensure excellent corrosion resistance and minimal contamination.
Designed to support long and large-diameter soot preforms with consistent geometry and density.
Rigid frame structure and proven process design support long-duration, stable industrial operation.
What is the advantage of a dual-burner VAD design?
The dual-burner configuration allows independent optimization of soot deposition and thermal stability, improving process consistency and preform quality.
What types of optical fibers can this equipment support?
The system is suitable for producing quartz preforms for both single-mode and multimode optical fibers.
How is material purity ensured during deposition?
Purity is ensured through the use of aerospace-grade titanium chambers, controlled process gases, and a fully sealed process environment.
Can the equipment be customized for specific production requirements?
Yes, the system can be customized in terms of preform size, deposition rate, control strategy, and integration with other equipment.
Can this equipment be integrated into a turnkey production line?
Yes, the system is designed for seamless integration into complete turnkey quartz preform manufacturing lines.
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