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Fusion Splicing
Apr 13, 2017

Fusion Splicing

Fusion splicing is the act of joining two optical fibers end-to-end using heat. The goal is to fuse the two fibers together in such a way that light passing through the fibers is not scattered or reflected back by the splice, and so that the splice and the region surrounding it are almost as strong as the virgin fiber itself. The source of heat is usually an electric arc, but can also be a laser, or a gas flame, or a tungsten filament through which current is passed.



The process of fusion splicing normally involves using localized heat to melt or fuse the ends of two optical fibers together. The splicing process begins by preparing each fiber end for fusion.


1. Stripping the fiber

Stripping is the act of removing the protective polymer coating around optical fiber in preparation for fusion splicing. The splicing process begins by preparing both fiber ends for fusion, which requires that all protective coating is removed or stripped from the ends of each fiber.


2. Cleaning the fiber

The customary means to clean bare fibers is with alcohol and wipes.


3. Cleaving the fiber

The fiber is then cleaved using the score-and-break method so that its end-face is perfectly flat and perpendicular to the axis of the fiber. The quality of each fiber end is inspected using a microscope. In fusion splicing, splice loss is a direct function of the angles and quality of the two fiber-end faces. The closer to 90 degrees the cleave angle is the lower optical loss the splice will yield. The quality of the cleave tool you are using is critical.


4. Splicing the fibers

Current fusion splicers are either core or cladding alignment. Using one of these methods the two cleaved fibers are automatically aligned by the fusion splicer in the x,y,z plane, then are fused together. Prior to the removal of the spliced fiber from the fusion splicer, a proof-test is performed to ensure that the splice is strong enough to survive handling, packaging and extended use. The bare fiber area is protected either by recoating or with a splice protector. A splice protector is a heat shrinkable tube with a strength membrane and less loss.

A simplified optical splicing procedure includes:

1).    Characteristics of placement of the splicing process.

2).    Checking fiber optic splice closure content and supplementary kits.

3).    Cable installation in oval outlet.

4).    Cable preparation.

5).    Organization of the fibers inside the tray.

6).    Installing the heat-shrinkable sleeve and testing it.

Aitelong’s SAT-17S fusion splicer is adopted high technology and 6 motors 3 axle alignment provide a high class performance. It’s featured as:

                                                                             Splicing machine

1). One key fast automatic splicing    

2). 9s splicing and 20s heating

3). 300x magnification

4). 3.7’’ High resolution color LCD

5). Up to 5000 splicing results storage

6). 6-direction 30 inch drop proof

For more details, please visit www.aitelong.com

or contact with sales@aitelong.com directly.


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