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Fiber Handling Techniques
All fiber splices must be created with the utmost care to minimize optical link budget losses.
To ensure fiber splices are within optical link budget loss specifications, follow the
suggestions below.
Important: Calix strongly recommends that all fiber splices be fusion splices.
Jacket preparation (OSP fiber)
Remove the jacket, buffer tubes and strength member using a wire stripper or cutting pliers.
The plastic buffer coating should be removed with a high-quality wire stripper.
Fiber preparation
Proper preparation of the fiber end face is critical to any fiber optic connection.
Perpendicularity and end finish must be within allowable tolerances in order to minimize
signal loss at these connections. A divergence of as little as 2° from perpendicular should be
considered unacceptable. The end finish should have a smooth, mirror-like finish free of
blemishes, hackles, lips, and burrs.
Ends should be prepared using the scribe and break method. While holding the fiber under
slight pressure, run the cutting tool across the stationary fiber at a perpendicular angle.
Properly done, the cleave produces a perpendicular, mirror-like finish without hackles or lips.
If major flaws are noticed, the process must be repeated. Inspect the fiber end under a
microscope to ensure proper finish.
Small scratches on the face or small pits on the outside rim of the cladding are common and
should be considered acceptable. Fusion splicer readings and experience more than anything
determines the definition of “small.”
Prior to putting the fiber ends into the fusion splicer, clean each end with pure optical grade
isopropyl alcohol and a lint free pad such as Texwipe™ Alco Pad or Texwipe™ Cloth.
Making the splice
In the field, a single fiber is spliced using an SC-APC connector. This connector must be
purchased separately. Insert both ends of the fiber to be spliced into the fusion splicer and
follow the instructions as recommended by the manufacturer. Inspect the connection in the
built-in viewer. The connection should appear to be seamless. Ensure that the signal loss on
the display is.05 db or less. Coil the successful splice inside the splice tray, taking care not to
exceed the bend radius parameters of the cable.
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