The invention provides a vacuum wiredrawing furnace for
optical fiber manufacturing. The vacuum wiredrawing furnace comprises an
optical fiber preform, a wiredrawing furnace chamber outer cover, a wiredrawing furnace body, a second vacuum area outer cover, a core heating area outer cover, a heating coil and a
graphite part, wherein a first vacuum area is defined by the wiredrawing furnace chamberouter cover, the second vacuum area outer cover and the wiredrawing furnace body; a second vacuum area is defined between the second vacuum area outer cover and the wiredrawing furnace body; a core heating area is defined between the core heating area outer cover and the wiredrawing furnace body; the
optical fiber preform sequentially penetrates through the wiredrawing furnace chamber outer cover,the second vacuum area and the wiredrawing furnace body and extends into the bottom of the core heating area in the wiredrawing furnace; the
graphite part is arranged at the bottom of the core heating area, and a circle of the heating coil is arranged on the upper side of the
graphite part in the circumferential direction of the optical
fiber preform. According to the vacuum wiredrawing furnace,the structural design is more optimized,
impurity pollution is avoided, the cost is lower and the consistency of optical
fiber parameters is better when common optical fibers are drawn, and the capability of drawing
photonic crystal optical fibers with a complex structure is achieved.