Optical fiber butt joint device

Abstract

The invention discloses an optical fiber butt joint device, which mainly comprises a tubular structure made of memory alloy materials. The initial inner diameter DT1 of an inner hole of the tubular structure is slightly smaller than the outer diameter of a bare optical fiber without a coating layer, after the inner hole of the tubular structure is expanded at low temperature, the inner diameter DT2 of the inner hole of the tubular structure is slightly larger than the outer diameter of the bare optical fiber, at the moment, the optical fiber can freely move in the inner hole of the tubular structure, after two optical fibers are in butt joint in the tubular structure, the tubular structure is heated so as to contract and clamp joints of the optical fibers, the optical fibers are automatically aligned with each other, and accordingly butt joint of the optical fibers is completed. The tubular structure can be an arrayed tubular structure so as to complete simultaneous butt joint of a plurality of optical fibers, accordingly, efficiency is greatly improved, and cost is reduced. The optical fiber butt joint device which is small in structure and is durable can be used for optical circuit connection in a photoelectric mixing circuit or pure light path board, can also be used for connection of FTTH (fiber to the home) and optical fiber ribbon cables and emergency rush repair of optical cables, and also can be used for realizing automatic butt joint links in optical fiber tests after being expanded when the optical fiber butt joint device is made of two-way memory alloy materials.

Description

technical field [0001] The invention relates to a device for connecting optical fibers, in particular to a device for connecting ends of optical fibers by using memory alloy tubes. Background technique [0002] As a communication line, optical fiber has been widely used in various regions of the world. With the development of optical fiber sensing technology, more and more optical fiber sensors are used in some flammable and explosive places. Since most of the optical fibers currently used in practice are silica fibers, their core diameters are generally in the range of 8-80 microns, so the requirements for optical fiber joints are very high, such as single-mode optical fibers. The core diameter is generally within 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. At present, in actual engineering, there are mainly two methods for connecting optical fibers: 1) Use an optical fiber fusion splic...

AI Technical Summary

Problems solved by technology

In the photoelectric hybrid circuit board, the connection between the higher-density optical circuits is a thorny problem, which requires high-precision optical fiber connectors. Some high-density and narrow spaces cannot accommodate the operation of ordinary optical fiber fusion splicers, and are not allowed. There is more space for remaining fiber coils, and the cost of using a large number of fiber fusion splicers is relatively high; while the commonly used fiber optic connectors are large in size, low in reliability, difficult to fix, and difficult to operate, and are not suitable for high-density optical path connections.

[0004] And the emergence of new characteristic optical fibers also puts forward more stringent requirements for splicing, such as photonic crystal fibers, carbon-coated fibers and other new types of optical fibers, which not only require high splicing quality but also require not to damage the fiber structure, such as photonic crystal fibers. Ordinary fusion splicers lead to the closure of the air gap, which increases the loss of the optical fiber joint and changes the optical transmission characteristics of the optical fiber, which has an impact on experiments and engineering applications.

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