Cleaving Optical Fiber
From this lesson you should learn:
How to use these tools to strip cable to the bare fiber
Fiber optic cable
wear safety glasses when doing any of
these exercises and dispose of all fiber
Rules - Read before beginning any
attempting this exercise, you should complete the
exercises on stripping
Familiarize yourself with the
1. Using what you learned from the fiber stripping
exercise, cut off 2-2.5" (50-60mm) of the cable jacket and
cut off the Kevlar strength members.
2. Use the fiber stripper to strip 1.5" (35-40mm) of the
fiber. and clean the fiber.
For splice or connector exercises, follow the stripping
and cleaving lengths specified for that component.
the fiber carefully in one hand while you open the
With the cleaver open, you can see the small black fiber
clamp. Open that.
6. Notice there are two grooves for fibers, one small for
250 micron buffer fiber and a larger one for 900 micron
buffer fiber. There is also a scale that tells you the
length of bare fiber that will be left after the fiber is
cleaved, important for fibers and connectors.
Insert the fiber in the larger groove and align the end of
the fiber buffer at 15mm, the middle of the range on the
7. Close the fiber holder to secure the fiber.
8. Close the lid of the cleaver.
9. Push the lever on the lower right side of the cleaver
to cleave the fiber.
10. Locate the fiber sticking out of the right side of the
cleaver. This will be the scrap fiber that needs to be
discarded-CAREFULLY! Grab the fiber scrap with your
fingers as you open the cleaver lid and dispose of the
scrap fiber immediately.
Clean up all your fiber scraps and dispose of them
in a container like a used take-out coffee cup clearly
marked "Fiber Scraps"! Seal this container with tape and
dispose of carefully when finished.
11. Open the fiber holder and remove your cleaved
12. Your fiber is ready to be inserted in the splice or
connector used in these exercises.
Watch this to see how it's done:
have successfully completed this exercise when
you have been able to strip the jacket and both
buffer coating layers from the fiber without
breaking the fiber and you have cleaved the
fiber to the proper length.
Try cleaving fiber several times and then fill in your Scorecard.
to Lesson Plan
This information is
provided by The Fiber Optic Association, Inc. as a
benefit to those interested in teaching, designing,
manufacturing, selling, installing or using fiber optic
communications systems or networks. It is intended to be
used as an overview and/or basic guidelines and in no
way should be considered to be complete or
comprehensive. These guidelines are strictly the opinion
of the FOA and the reader is expected to use them as a
basis for learning, as a reference and for creating
their own documentation, project specifications, etc.
Those working with fiber optics in the classroom,
laboratory or field should follow all safety rules
carefully. The FOA assumes no liability for the use of
any of this material.