Optical fiber splicer

Abstract

The invention discloses an optical fiber splicer which comprises an alignment tube composed of a memory alloy material. Two ends of the alignment tube are conic optical fiber introduction port. The relationships of the initial inner diameter DT1 of an inner hole of the alignment tube with optical fiber and the inner diameter DT2 of the inner hole of the alignment tube after the alignment tube expands at low temperature with the optical fiber are (1) [1-(1-S)*K]*DF<DT1<DF and (2) DF<DT2<DF*(1+S*K). DF is the outer diameter of the optical fiber when the optical fiber is in abutted connection. K is a shape memory strain coefficient of the alignment tube made of the memory alloy material. S is a selected proportionally coefficient. The optical fiber splicer further comprises a heat-shrinkable sleeve tube. A hot melting tube and a reinforcing piece arranged outside the hot melting tube and parallel to the hot melting tube are arranged inside the heat-shrinkable sleeve tube. The alignment tube is placed on the middle portion inside the hot melting tube. According to the optical fiber splicer, the memory alloy tube is mainly adopted and optical fiber end head connection is performed. The optical fiber splicer has the advantages of being low in cost, easy and convenient to use and good in long-term stability.

Description

technical field [0001] The invention relates to an optical fiber connection device, in particular to an optical fiber connector. Background technique [0002] Optical fiber has been widely used in various regions of the world as a communication line, and it also has great application prospects as a new type of sensing device. Since most of the optical fibers currently used in practice are silica fibers, their core diameters are generally in the range of 4-80 microns, so the requirements for optical fiber joints are very high, such as single-mode optical fibers. The core diameter is generally between 8-10 microns Between two optical fibers, there will be a large loss if the joint deviation of the two optical fibers is one micron. On the other hand, fiber-to-the-home (FTTH for short) is the goal of the next stage of optical fiber communication. In the large-scale application of FTTH, a large number of optical fiber splicing work is required. If the method of fusion splicing m...

AI Technical Summary

Problems solved by technology

However, the optical fiber docking device disclosed in this patent still has problems in actual use. The optical fiber docking device can only clamp the bare fiber part of the optical fiber and align the optical fiber, but there will be a gap between the bare fiber and the optical fiber that has not removed the coating layer. Leave a gap. Anyone who knows a little about optical fibers knows that without the protection of the coating layer, the strength of the bare fiber is very low, which will cause the bare fiber in the gap to be easily broken, resulting in the failure of the fiber connection. Or abnormality occurs in long-term use

Of course, this defect can also be filled with adhesives such as heat-shrinkable sleeves or epoxy resin to make up the gap, which will lead to problems such as increased volume, complicated operation, and reduced long-term reliability.

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