Double-fiber capillary tube and preparation method thereof

Abstract

The invention provides a preparation method of a double-fiber capillary tube, wherein the preparation method comprises the following steps: penetrating two molybdenum wires into a single-hole glass mother rod, putting in a fiber drawing furnace, heating and melting; after the glass mother rod is melted, clamping the two ends of the glass mother rod with a clamp, and clamping the glass mother rod by the clamp to move at different speeds in the direction away from the molybdenum wires; and pulling the molten glass mother rod until the outer diameter accords with a preset parameter, naturally cooling, and cutting off the formed glass broken filaments. The two molybdenum wires penetrate into the glass mother rod, the glass mother rod is put into the wire drawing furnace to be heated and melted, the hot-melted glass mother rod is clamped by the clamp to be subjected to traction wire drawing, the outer diameter of the glass broken filaments is adjusted to meet preset parameters, the formed glass broken filaments are cut off after natural cooling, through natural cooling, the internal stress of a product can be reduced, and the problems of cracks and the like on the product can be prevented. The invention further provides the double-fiber capillary tube which is suitable for the preparation method of the double-fiber capillary tube.

Description

technical field [0001] The invention relates to the field of optical fiber communication equipment, in particular to a dual-fiber capillary and a preparation method thereof. Background technique [0002] Optical fiber capillary is used in optical high-speed analog devices, optical fiber collimators, pigtail assembly, cable television networks, adjustment and alignment of optical active and optical passive devices, DWFM and interface components that require conversion connections for optoelectronic devices. Whether it is a standard fiber capillary or a non-standard fiber capillary, most of the inner holes are circular microholes. Because the diameter of the micropores is too small, it is difficult to insert the fiber, so there is a bell-shaped fiber capillary. [0003] The inner wall of the existing optical fiber capillary has strong stress, and the product is prone to cracks, which has a bad influence on the transmission of optical signals. Contents of the invention [00...

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Problems solved by technology

[0004] In order to overcome the technical problems that the inner wall of the current optical fiber capillary has strong stress, cracks are prone to occur, and the optical signal transmission is adversely affected, the present invention provides a dual-fiber capillary and its preparation method

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