| 摘要 |
<p>Improved method of making optical fibers utilizing a technique for minimizing taper, including entrance taper, in an optical fiber preform made by the deposition of reacted glass precursor material on the inside of a tube. In one embodiment, a torch (or other heat source) deposition function is determined, which relates the amount of deposited material as a function of distance from the torch or other heat source. A velocity profile for the moving heat zone can then be determined that minimizes taper. For example, in a single mode optical fiber preform made by the modified chemical vapor deposition technique, a reduction in entrance taper in a 90 cm long preform of from about 30 cm (31) using a linear velocity profile to about 10 cm (32) with a profile determined according to the inventive technique is achieved.</p> |
