how to repair fiber optic cable

How to Repair Fiber Optic Cable?

Fiber optic cable needs to be repaired as soon as possible after it is damaged, and Bwnfiber introduces a few tools and steps to repair fiber optic cable. Fiber optic cable is mainly used to transmit high-speed broadband data and signals. It is more durable and safer than traditional copper cables. However, fiber optic cables can be accidentally damaged or broken. This often occurs from abrasion or rodent damage on unprotected cable, or simply from accidental damage from man-made. This can cause network outages, reduced communication quality, and other issues. Therefore, these damaged fiber optic cables need to be repaired as quickly as possible.

how to repair fiber optic cable

When a fiber optic cable is damaged and causes a network outage, we should check the damage level of the cable. If the fiber optic line plug is damaged, try replacing it. If the fiber optic cable is severely damaged and can’t be repaired, replacing it with a new one is also the best option. However, damaged fiber optic cables should still be repaired to avoid costly delays and expensive repairs. As a fiber optic cable supplier and manufacturer in China, Bwnfiber introduces a few tools and steps to repair fiber optic cable.

Tools of Repair Fiber Optic Cable

To successfully repair fiber optic cable, you’re going to need to prepare some devices or tools before you start. These tools mainly include mechanical tools, test instruments, fiber optic splices, etc.

Mechanical tools

Fiber Optic Stripper

Fiber optic strippers are used to remove the outer sheath of fiber optic cables and strip off the fiber sleeves. They are important tools when operating optical cables.

Fiber Optic Cleaver

A fiber optic cleaver is used to cut the fiber for fusion splicing, also ideal for preparing fiber for pre-polished connectors to make a good end face.

Fiber optic fusion splicer

A fiber optic fusion splicer may be the high-voltage electric arc to melt two fibers, thereby fusing them. This equipment provides a precise, durable, and easy fiber cable connection solution.

Fiber Optic Fusion Splicer


Pliers can be used to tighten fiber optic cable connectors, clips, etc.


Tweezers are used to repair small parts.


Screwdrivers are used to tighten fiber optic cable connectors, etc.

Test instruments

Optical power meter

An optical power meter is used to test whether the power of fiber transmission is normal and whether the connection is stable.


OTDR is called an optical time domain reflectometer. It is used to measure the loss and events of optical cables, which can provide fault locations for maintenance personnel.

Light source

The light source is used to test whether the optical fiber connection is normal and can reflect the location of the optical fiber port.

Fiber optic splice

Fiber optic connector

A fiber optic connector is used to connect two optical cables, including ST, SC, LC, FC, and other types.

Fiber optic splice closure

Fiber optic splice closure brings the connectors together to facilitate the maintenance and protection of fiber connectors.

Repair tools

Optical cleaning agent

An optical cleaning agent is used to clean the surface of connectors and plugs to ensure the quality of connection.

Cleaning cloth

A cleaning cloth is used to wipe the surface of connectors and plugs.

Steps to Repair Fiber Optic Cable

1, Inspect the Break in the Fiber Optic Cable

First, you need to inspect the break in the fiber optic cable to identify and inspect the damage. Typically, fiber technicians use an OTDR for inspection. It sends pulses of light directly into the fiber optic cable. When it encounters a break, it deflects it toward your device. Therefore, it helps the technician know the position of the break.

2, Cut Out the Damaged Fiber Optic Cable

You’ll need to remove the damaged section from your cable. Cut your fiber optic cable using a fiber optic cutter.

3, Strip the Fiber Optic Cable

You should use a fiber optic stripper to strip the fiber on the end and jacket to expose the optic fiber tube inside. Then, cut any sheath and yarn to remove the outer coating.

4, Clean the Fiber Optic Cable

Use alcohol and a cleaning cloth to wipe down the fiber. Once clean, do not touch the ends of the fiber to preserve its integrity.

5, Splice the Fiber Optic Cable

The two most common methods of fiber splicing are mechanical and fusion. There are many factors to consider when choosing which type of fiber splicing to perform.

Splicing Fiber Optic Cable

Mechanical Splicing

Mechanical splicing uses a small mechanical splice that precisely aligns two fiber optic cables and then secures them mechanically. After the two ends are secured, a snap-type or adhesive cover is used to fasten the splice permanently.

Fusion Splicing

Fusion splicing is the most used method of fiber optic splicing. It first uses a fusion splicer machine to align the two fiber ends. Then, an electric arc is used to “fuse” the glass ends together.

6, Test

You can use an OTDR to test the strength of the signal, fixing any issues as needed. Then put back those splices into the splice enclosure. Close the enclosure after which rebury the fiber optic cables.

In Conclusion

The damage to fiber optic cable can cause network outages, reduced communication quality, and other issues. Therefore, it is an important task to repair the damaged optical cable in time.

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