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    • 8. 发明申请
    • OPTICAL FIBER PREFORM MANUFACTURING APPARATUS AND METHOD FOR SHRINKAGE AND CLOSING OF DEPOSITED TUBE
    • 光纤预制件制造装置和储存和封闭沉积管的方法
    • WO00034195A1
    • 2000-06-15
    • PCT/KR1999/000692
    • 1999-11-17
    • C03B37/027C03B37/012C03B37/018G02B6/00
    • C03B37/01248C03B37/01257C03B37/01853C03B37/01869
    • Disclosed are an optical fiber preform manufacturing apparatus and method in which processes for shrinking and closing a deposited tube are conducted using a device suitable for those processes, which device is other than the device used in a deposition process for forming the deposited tube on the inner surface of a preform tube, thereby reducing the processing time while reducing the amount of OH penetrated from the preform tube into a vitreous component of the deposited tube, thereby achieving a reduction in OH loss. In accordance with the optical fiber preform manufacturing apparatus and method, operations are conducted which involve setting the heating temperature of a circular heater to a temperature lower than the softening point of a deposited tube, exhausting contaminants existing in the interior of the deposited tube while moving the circular heater at a desired temperature, setting the heating temperature of the circular heater to a temperature not lower than the softening point of the deposited tube, and shrinking and closing the deposited tube while moving the circular heater to a desired temperature.
    • 公开了一种光纤预制棒的制造装置和方法,其中使用适用于这些工艺的装置进行用于收缩和沉积沉积管的工艺,所述装置不同于用于在内部形成沉积管的沉积工艺中使用的装置 从而减少处理时间,同时将从预成形管穿透的OH的量减少到沉积管的玻璃质成分中,从而实现OH损失的降低。 根据光纤预制棒的制造装置和方法,进行以下操作:将圆形加热器的加热温度设定为低于沉积管的软化点的温度,排出存在于沉积管内部的污染物,同时移动 在所需温度下的圆形加热器,将圆形加热器的加热温度设定为不低于沉积管的软化点的温度,以及在将圆形加热器移动到所需温度的同时收缩并沉积沉积的管。