Sản Xuất Phôi Sợi Quang bằng CVD Cải Tiến

Tạo ra thủy tinh mang dữ liệu của thế giới

Electronics & Semiconductors Global Industrial Scale $8 billion

Tổng quan

Optical fiber preforms are manufactured by depositing ultra-pure silica glass layers inside a rotating tube using modified chemical vapor deposition (MCVD) or outside vapor deposition (OVD). The preform, a solid glass rod with precisely controlled refractive index profile, is then drawn into fiber at 2,000 degrees C. A single 1-meter preform yields 300+ km of optical fiber. The glass must be extraordinarily pure — impurity levels below parts per billion — to achieve transmission losses under 0.2 dB/km at 1,550 nm wavelength.

Quy trình hóa học

In MCVD, SiCl₄ and GeCl₄ vapors mixed with O₂ are flowed through a rotating silica tube while an external oxy-hydrogen torch traverses the length. The precursors oxidize at 1,800 degrees C to form SiO₂-GeO₂ soot that sinters into glass layers on the inner wall. After 40-60 passes, the tube is collapsed into a solid preform rod by heating to 2,100 degrees C. The preform is drawn into 125-micron fiber at 2,000 degrees C in a draw tower.

SiCl₄ + O₂ →[1,800 degrees C] SiO₂ + 2Cl₂
GeCl₄ + O₂ → GeO₂ + 2Cl₂
SiO₂-GeO₂ soot →[sintering] Glass (vitrification)

Nguyên liệu thô

  • Silicon tetrachloride (SiCl₄) — Chlorination of silicon (Silica precursor (ultra-pure))
  • Germanium tetrachloride (GeCl₄) — Chlorination of germanium (Refractive index dopant for core)
  • Oxygen (O₂) — Air separation (Oxidant for glass formation)

Sản phẩm cuối

  • Optical fiber preform — Drawn into single-mode and multimode optical fiber (1 preform yields 300+ km of fiber)
  • Optical fiber (drawn product) — Telecommunications, internet backbone, sensors (125 micron diameter, <0.2 dB/km loss)
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Environmental Impact

Chlorine gas is generated as a byproduct and must be scrubbed or recycled. SiCl₄ and GeCl₄ are corrosive and react violently with water. However, the extremely low mass of fiber produced per km means the per-unit environmental impact is modest. Optical fiber displaces copper cable, saving significant copper mining.

Lưu ý an toàn

Đổi mới gần đây

Hollow-core photonic crystal fiber (HCPCF) transmits light through air rather than glass, potentially reducing latency by 30%.
Multi-core and few-mode fibers multiply capacity per fiber strand.
Fluorine-doped cladding replaces germanium-doped cores in some designs to reduce costs.

Quy mô sản xuất

50000

tấn/năm

$8 billion

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Frequently Asked Questions

What industry uses Sản Xuất Phôi Sợi Quang bằng CVD Cải Tiến?
Sản Xuất Phôi Sợi Quang bằng CVD Cải Tiến is used in the electronics & semiconductors sector at global industrial scale scale.
What process is involved in Sản Xuất Phôi Sợi Quang bằng CVD Cải Tiến?
In MCVD, SiCl₄ and GeCl₄ vapors mixed with O₂ are flowed through a rotating silica tube while an external oxy-hydrogen torch traverses the length. The precursors oxidize at 1,800 degrees C to form SiO₂-GeO₂ soot that sinters into glass layers on the inner wall. After 40-60 passes, the tube is collap
What is the economic significance of Sản Xuất Phôi Sợi Quang bằng CVD Cải Tiến?
Sản Xuất Phôi Sợi Quang bằng CVD Cải Tiến has a market value of $8 billion and annual production of 50,000 tons.
What is the environmental impact of Sản Xuất Phôi Sợi Quang bằng CVD Cải Tiến?
Chlorine gas is generated as a byproduct and must be scrubbed or recycled. SiCl₄ and GeCl₄ are corrosive and react violently with water. However, the extremely low mass of fiber produced per km means the per-unit environmental impact is modest. Optical fiber displaces copper cable, saving significan
What raw materials are used in Sản Xuất Phôi Sợi Quang bằng CVD Cải Tiến?
The main raw materials include: Silicon tetrachloride (SiCl₄), Germanium tetrachloride (GeCl₄), Oxygen (O₂).