High Purity Synthetic Fused Silica Substrate Tubes Brochure

Heraeus substrate tubes are the premier choice for production of core rods for single mode, multimode, and specialty optical fibers. Our tubes are utilized in MCVD (Modified Chemical Vapor Deposition) and similar deposition processes used to manufacture core rods. The core material of the final fiber results from the deposition of multiple layers of pure and doped fused silica on the inner surface of the substrate tube. Oxygen-hydrogen burners, electrical furnaces or plasma torches can be used as energy sources for these chemical deposition processes using Heraeus` substrate tubes. Once the core material is deposited, the tube is gradually collapsed into a solid core rod under high heat and vacuum.