Title :
Optical fiber drawing method with gas flow controlling system
Author :
Imoto, Katsuyuki ; Sumi, Masao ; Toda, Gyozo ; Suganuma, Tsuneo
Author_Institution :
Hitachi Ltd., Tokyo, Japan
Abstract :
A method for reducing the diameter variation of optical fibers during fiber drawing is described. The method is based on the control of gas flow and drawing speed. Rapid fluctuations in diameter are suppressed by adjusting the gas flow rate, and slower ones are controlled by changing the drawing speed. The efficiency of this method has been tested by applying stepwise disturbance of +or-63% in preform feeding speed. Fluctuations of fiber diameter are controlled within +or-1 mu m despite the forced disturbance. By applying this method to high-speed drawing (30 m/min), a high-tensile-strength fiber, with diameter fluctuations within +or-1 mu m and transmission losses near the 0.85- mu m wavelength region of approximately 3 dB/km, is achieved.<>
Keywords :
drawing (mechanical); optical fibres; optical workshop techniques; 0.85 micron; 3 dB; diameter fluctuations; drawing speed; gas flow controlling system; high-tensile-strength fiber; optical fibre drawing method; transmission losses; Control systems; Fluctuations; Fluid flow; Optical control; Optical fiber cables; Optical fiber losses; Optical fiber testing; Optical fibers; Preforms; Propagation losses;
Journal_Title :
Lightwave Technology, Journal of
