Abstract
Fiber optic taper is an important component in the CCD coupling, television imaging and night vision device. Increasing need in high-resolution picture transmission devices requires better quality of high-ratio fiber optic taper. The resulting taper shape is important as it affects transmission properties of fiber optic taper. This paper develops a physical model for analyzing the high-ratio fiber optic taper time-dependent fabricating process. Based on the physical model, the evolution of the taper's neckdown profile is analyzed. Simulation results demonstrate that viscosity of materials, furnace geometry, temperature distribution in the furnace and the external tensile force will strongly affect the drawing process. The final shape of fiber optic taper depends on material properties and heating profile. The tensile force, which will affect the evolution process, has a minor influence on the taper's final shape. Based on the understanding of the above analysis, an improved drawing design can be proposed for fabricating large radius fiber optic taper with high ratio.
Highlights
IntroductionFiber optic taper is an optical component for picture transmission, e.g., CCD coupling, television imaging and night vision device
This paper develops a physical model for analyzing the high-ratio fiber optic taper time-dependent fabricating process
Fiber optic taper is an optical component for picture transmission, e.g., CCD coupling, television imaging and night vision device
Summary
Fiber optic taper is an optical component for picture transmission, e.g., CCD coupling, television imaging and night vision device. It contains thousands of optical fiber usually made of silica glass preform and each optical fiber represents a pixel [1]. High ratio fiber optic taper has large radius at one end and a narrow one at another end. The diameter of the large end is about 0.095 m and nearly four times of the small end [2]. Quality of transmitted picture strongly depends on the tapering process. Improved quality of the fiber optic taper requires a better controlled manufacturing process
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