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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.

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Presentation on theme: "Chapter 3: Preform manufacture and fiber drawing Production of silica glass through deposition Melting of ultrapure glass with furnace heated by radio."— Presentation transcript:

1 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.

2 Flowchart of the production of ultrapure silicon dioxide from natural quartz or quartz mineral sands.

3 Deposition of silicon dioxide at high temperature in an ultrapure quartz tube in the MCVD (Modified Chemical Vapor Deposition) process.

4 Modified Chemical Vapor Deposition (MCVD) Process description MCVD – deposition at Acreo Fiber Lab in Hudiksvall Sweden.

5 Process description The MCVD – process.

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

7 Outside Vapor Deposition (OVD) Process description: phase 1 - deposition The OVD method for making a preform.

8 Process description: phase 2 - the sintering process The porous preform is collapsed into a solid glass rod.

9 Process description: phase 3 – fiber drawing Fiber drawing.

10 Vapor-Phase Axial Deposition (VAD) Production process Schematic diagram showing the VAD method of preform manufacture.

11 Fiber drawing Fiber drawing – principle drawing.

12 Fiber drawing Fiber drawing - top of the tower. Typical primary coated single-mode fiber.


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