Effect of Ultra-Low Expansion Quartz Glass Layer on the Enhancement Performance of Quartz Optical Fiber

In this paper, the prefabricated rod of quartz fiber was prepared by MCVD method. A thickness of ultra-low expansion(ULE) quartz glass was deposited in the wall of quartz tube, and then quartz and its dopants were deposited. Finally, the prefabricated rod of quartz fiber preform containing doped TiO 2 layer was successfully prepared by high temperature dehydroxylation treatment. The strength of quartz fiber obtained by wire drawing for the prefab rod is significantly improved. The experimental results showed that the quartz glass layer with TiO 2 doped has a lower thermal expansion coefficient, the doped of TiO 2 is amount 5 wt%, and the doped layer thickness is 4%, the optical fiber has the best enhancement. The maximum tensile strength of the organic coating is up to 75.5N, which is higher (6.34%) than that of the commercial optical fiber (71N).