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Chapter 3: Preform manufacture and fiber drawing. Production of silica glass through deposition. Melting of ultrapure glass with furnace heated by radio frequency (RF) induction. Flowchart of the production of ultrapure silicon dioxide from natural quartz or quartz mineral sands.

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chapter 3 preform manufacture and fiber drawing

Chapter 3: Preform manufacture and fiber drawing

Production of silica glass through deposition

Melting of ultrapure glass with furnace heated by radio frequency (RF) induction.

slide2
Flowchart of the production of ultrapure silicon dioxide from natural quartz or quartz mineral sands.
slide3
Deposition of silicon dioxide at high temperature in an ultrapure quartz tube in the MCVD (Modified Chemical Vapor Deposition) process.
modified chemical vapor deposition mcvd
Modified Chemical Vapor Deposition (MCVD)

Process description

MCVD – deposition at Acreo Fiber Lab in Hudiksvall Sweden.

process description
Process description

The MCVD – process.

collapse of the preform
Collapse of the preform

Intense heating causes the hollow preform to soften and collapse to a solid rod.

outside vapor deposition ovd
Outside Vapor Deposition (OVD)

Process description: phase 1 - deposition

The OVD method for making a preform.

process description phase 2 the sintering process
Process description: phase 2 - the sintering process

The porous preform is collapsed into a solid glass rod.

vapor phase axial deposition vad
Vapor-Phase Axial Deposition (VAD)

Production process

Schematic diagram showing the VAD method of preform manufacture.

fiber drawing
Fiber drawing

Fiber drawing – principle drawing.

fiber drawing1
Fiber drawing

Fiber drawing - top of the tower.

Typical primary coated single-mode fiber.

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