The Research On The Rheological Formation For The Special Optical Fiber Preform

Optical fiber manufacturing technology has been considerable development since optical fiber communication were first demonstrated by Kao in 1966. Nowadays we can fabricate optical fibers with high speed, large capacity, long distance. Meanwhile, the development of optical fiber technology is also being conducted to optical fiber communication and optical fiber sensing. With the demand for the fiber industry, the development of new specialty fibers and fiber devices draws the attention of the public. In this circumstance,as some microstructure optical fiber such as photonic crystal fiber is reported. Theoretical models and methods for characterization of microstructure fibers mature, but optical fiber manufacturing has been a problem in this area.In this paper we first introduced the processes for fabricating optical fibers, which include preform manufacturing process and drawing process. Preform manufacturing process also includes vapor deposition method and the non-vapor deposition method, according to the characteristics of each method with combining experimental study of this paper to select the appropriate process. Then the choice and classification of materials as well as quartz optical fiber preform produced MCVD chemical processes are carried out a detailed description,and the quartz material impact on the optical fiber transmission characteristics were analyzed. In addition, according to the related hydrodynamic equations, Establishing the model of the hollow fiber preform drawing process,and use the finite element software Polyflow analysis different structures ( hollow, partial holes, double-holes ) optical fiber preform drawing process to obtain different drawing parameters ( temperature, feed speed, drawing speed )impact on shape change of the neck-down profiles and the air holes, as well as the effect of the position of each hole in the fiber preform to the final hole shaped air hole fiber. Finally,based on the results of the analysis of the optical fiber preform holes to determine the position of dual-core, dual-core fiber structure design, combined with the MCVD process, ultrasonic drilling techniques, group process and stick drawing process to produce a dual-core fiber.