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In this diagram, we see how the preform is made. A seed rod is slowly rotated and pulled upward. As the seed rod is pulled, two burners deposit fine glass soot. The lower burner in this diagram is depositing the core glass material, and above it is a burner depositing the cladding glass. The rate at which the seed rod is pulled is carefully controlled by servo mechanisms. After deposition the glass soot rod is dehydrated and sintered into a solid preform in a furnace.
Drawing the fiber
The next process in manufacturing the fiber optics is to convert into hair-thin fiber. Fiber draw is the phenomenon for the manufacturing those hair-thin fiber. Thetip of on performance is lowered into high-purity graphite furnace. Pure thin glass are injected into furnace and in furnace, tightly controlled temperature approaching 1900 celcius soften the tip if the perform. Once the softening point of the tip is reached, gravity takes ove and occurs free fall untill it has been strecthed into thin strand. then those fiber are pulled by tractor belt shown in the figure below.
Drawing process only begins when operater threds this strands into coting dies.Diameter of the fiber during draw is controlled to 125 micorns within 1 micron tolerace. The rate for sampling the fiber is 750 times per second while the actual value of diameter is compared to 125 micron target. Drawing spedd is higher if the diameter is above than target diameter and vicerversa. After diameter case two layer coating is applied to the fiber with soft inner coating and hard outer coating which will be more disccuesd on coating for the protection of fiber in section below.
Coating the Fiber for Protection (vladmir's part)Drawing the fiber
Test and Measurement (vladmir's part)
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