Fiber Optic Splicers Information

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Fiber optic splicers are tools that join two optical fibers end-to-end. Applications for fiber optic splicers include networking and telecommunications. They are also known as fusion splicers. They are often used with Fiber Optic Cleavers and Fiber Optic Cleaning Tools


Fiber optic splicers are commonly made of tungsten electrodes and a metal holder for the fibers. Fiber optic splicers are generally used on benchtops. The most prominent components of fiber optic splicers are the electrode that fuses the two fibers, and the alignment method that aligns the two fibers.


The primary function of a fiber optic splicer is to fuse, or weld, two optical fibers end to end to with an electric arc. These tools rely on fusion electrodes to complete the splicing of the fibers. The fibers must be aligned perfectly for the fusion to be accurate, or there is a potential for loss of signal. There are single fiber, single mode, and multiple fiber, multimode, splicers available depending on what cable is being spliced.



The two fiber alignment types are profile alignment and local injection and detection.


Profile alignment illuminates the two fibers from two light sources 90 degrees apart which is then viewed from two cameras. Software automatically aligns the fibers using the camera and stages.


Fiber profile alignment

 Fiber profile alignment. Image credit: Fiber Optic Association 

Local injection and detection bends the fibers then shines a light on the exterior of the fiber which is then coupled into the core and software using a light detector aligns the fibers.


Local injection fiber optic alignment

Local injection fiber optic alignment. Image credit: Fiber Optic Association


The follow specifications determine the functionality of fiber optic splicers.


  • Fiber Splicing size -- the size of the fibers the splicer can fuse.
  • Splicing Method -- the method that the two fibers are fused.
  • Average Loss -- the loss of signal after the fibers are fused.

  • Splice time -- the time it takes the splicer to fuse the two fibers.


These features provide additional utility or ease-of-use.


  • LCD Touch Screen -- is the user interface and the method of viewing the alignment of the fibers.
  • Carrying Case -- the splicer is contained within a carrying case for easy transportation.
  • Ruggedized -- the splicer is fully ruggedized for harsh environments.



A-A-59799 -- Fusion splicer and cleaver, optical fiber


SAE AS6479 -- Splicer, fusion, fiber optic, aerospace


TIA-440 -- Fiber optic terminology




The Fiber Optic Association, Inc.


Fiber Instrument Sales, Inc.



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