1. Training_Fiber production_GB Page 1 How to make an optical fiber September 2013

2. Training_Fiber production_GB Page 2 Faser Fiber optic is working with total reflection and therefore 2 materials with different density/refractive index are necessary: pure homogeneous refractive index within core Core (light transmission) Cladding (light guiding)

3. Training_Fiber production_GB Page 3 Glas fiber index profile Core = continues refraction index SM – Step indexMM – Graded index Core = Parabolic refraction index Trench = lower refraction index n1n2n1n2 n1n2n1n2

4. Training_Fiber production_GB Page 4 Manufacturing process for a preform Herstellungsprozess Vorform VAD Vapor Axial Deposition OVD Outside Vapor Deposition MCVD Modified Chemical Vapor Deposition PCVD Plasma Chemical Vapor Deposition

5. Training_Fiber production_GB Page 5 Furnace (1200 o C) Resonator Plasma Quartz Tube SiCl 4 GeCl 4 C2F6C2F6 + + + O2O2 Vacuum pump Magnetron PCVD-process (Pat. of Draka Comteq)

6. Training_Fiber production_GB Page 6 PCVD-process  Collapsing (appr. 1500 layers)

7. Training_Fiber production_GB Page 7 Drawing tower (schematic view) Feeder Preform Furnace Size dedector Primary coating

8. Training_Fiber production_GB Page 8 Primary Coating for GOF Primary coating (Acrylat) Protection of the cladding and improvement of mechanical and thermal properties Fiber

9. Training_Fiber production_GB Page 9 The final result