The invention discloses a device and a method for manufacturing a tapered
optical fiber. The device comprises an
optical flat, a
computer terminal, a
carbon dioxide laser, a scanning
galvanometer, a
metal film plated reflector, a placing platform, two bi-dimensional accurate adjusting brackets, two
optical fiber fixing parts and a plurality of pairs of weights. The placing platform is used for placing the
metal film plated reflector, the two bi-dimensional accurate adjusting brackets are respectively arranged on two sides of the placing platform, the two
optical fiber fixing parts are respectively fixed on the two bi-dimensional accurate adjusting brackets and are respectively used for fixing one of two ends of the processed optical
fiber, the plurality of pairs of weights are used for suspending on the two ends of the processed optical
fiber, the mirror surface of the reflector is right against an output end of the
carbon dioxide laser, during usage, a portion to be processed with a
coating layer removed in the processed optical
fiber is enabled to tightly cling to the mirror surface of the reflector and is located on a focal plane of a focusing lens of the
carbon dioxide laser, output laser spots of the
carbon dioxide laser are controlled by the
computer terminal, and the weights are quickly pulled after one scanning is completed to obtain the tapered optical fiber. Not onlythe
processing time is shortened, but also physical damage to the optical fiber caused by long time action of the output laser spots on the optical fiber is avoided.