Perpendicular stretching method and equipment for optical fiber perform

The invention discloses a perpendicular stretching method and equipment for an optical fiber perform. The method comprises the steps that a large-diameter optical fiber perform is clamped, pretreatment starts to be performed on the optical fiber perform, and key parameter values in the stretching process are obtained in advance; then, an upper clamping device and a lower clamping device are controlled to synchronously rotate, the large-diameter optical fiber perform is heated to a semi-molten state through a heating device, an upward moving velocity V is applied to the large-diameter optical fiber perform in the perpendicular direction through the upper clamping device, meanwhile, the heating device moves at an upward velocity V , and the outer diameters obtained before and after stretching meet the relation V *the square of D =V *(the square of D -the square of D ). By means of the perpendicular stretching method and equipment for the optical fiber perform, the hysteretic nature in a common real-time feedback adjusting mode can be effectively avoided, the influence of the geometric dimension of the large-diameter optical fiber perform on a stretching result can be reduced to the maximum degree, the stretching control precision is improved, and the machining efficiency is further improved.