Fibre Testing – Tips and Tricks from Our Experts

Fibre optic cables have become a cornerstone of modern communication networks, providing faster and more reliable data transmission than traditional copper cables. However, ensuring the performance and integrity of fibre optic cables requires regular testing to maintain the necessary standards.

In this article, we will discuss the different types of fibre optic testing, the tools and equipment needed for testing, and tips and tricks from our experts for conducting effective fibre testing.

Types of Fibre Optic Testing:

There are different types of fibre optic testing, each with a specific purpose. The most common types of fibre optic testing are:

Optical Time-Domain Reflectometry (OTDR)

OTDR testing is a popular method for checking the overall quality and integrity of fibre optic cables. It involves sending a pulse of light into the cable and measuring the time and intensity of the reflected light.

The data collected by the OTDR is then used to create a graphical representation of the cable’s length, attenuation, and other parameters. OTDR testing is useful for identifying issues with the cable, such as breaks or bends, and can help locate the position of the issue along the cable length.

It is also useful for detecting splices, connectors, and other points of signal loss. OTDR testing is typically conducted using specialized equipment, and it is recommended to be conducted at least once a year.

Insertion Loss Testing

Insertion loss testing is another common method for testing fibre optic cables. It measures the amount of light that is lost as it travels through the cable. The test involves sending a known amount of light into the cable and measuring the amount of light that comes out the other end.

By comparing the input and output levels, the insertion loss can be calculated.Insertion loss testing is useful for measuring the signal loss at points along the cable, such as connectors or splices.

It is typically conducted using specialized equipment, and it is recommended to be conducted at least once a year.

Polarization Mode Dispersion (PMD) Testing

PMD testing is used to measure the variation in the time it takes for light to travel through different parts of the cable. PMD can cause distortion and signal loss, so it is essential to test for it.

PMD testing involves sending two pulses of light into the cable, one vertically polarized and one horizontally polarized, and measuring the time difference between the two.

PMD testing is useful for identifying issues with signal distortion or loss along the cable length. It is typically conducted using specialized equipment, and it is recommended to be conducted at least once a year.

Tools and Equipment for Fibre Testing

To conduct fibre testing effectively, it is essential to have the right tools and equipment. The most common tools and equipment needed for fibre testing are:

• Fibre Optic Testers
  Fibre optic testers are specialized devices used for conducting fibre optic testing. They typically include features for OTDR testing, insertion loss testing, and PMD testing. Fibre optic testers are available in a range of sizes and configurations, from handheld devices to rack-mounted units.When selecting a fibre optic tester, it is important to consider the types of testing needed, the frequency of testing, and the budget. High-quality fibre optic testers can be expensive, so it is essential to choose a model that meets the needs of the testing while staying within the budget.
• Cleaning Supplies
  Dirty or damaged fibre connectors can cause signal loss and affect the test results. Therefore, it is essential to ensure that the connectors are clean and free from any debris. Cleaning supplies for fibre connectors include specialized cleaning solutions, wipes, and swabs.When selecting cleaning supplies, it is important to choose products that are specifically designed for fibre optics and avoid using general-purpose cleaning solutions or materials. These can cause damage to the connectors and affect the test results.
• Visual Fault Locators (VFL)
  Visual fault locators are compact, handheld devices used for identifying breaks, bends, or faults in fibre optic cables. They work by emitting a bright red laser light that can be easily seen through the cable jacket. By moving the VFL along the cable, breaks or faults can be easily identified.VFLs are a useful tool for identifying issues quickly and can be especially helpful when conducting repairs or troubleshooting. They are relatively inexpensive and easy to use, making them a valuable addition to any fibre testing toolkit.
• Fibre Optic Cleaning Kits
  Fibre optic cleaning kits are comprehensive kits that contain all the cleaning supplies needed for effective fibre optic cleaning. They typically include cleaning solutions, wipes, swabs, and tools for connector cleaning. Fibre optic cleaning kits are essential for maintaining the integrity and performance of fibre optic cables and can help prevent signal loss and other issues.When selecting a fibre optic cleaning kit, it is important to choose a kit that includes all the necessary supplies and tools for cleaning the specific connectors used in the network. It is also important to ensure that the cleaning solutions and materials are safe to use and will not cause damage to the connectors.

Tips and Tricks for Effective Fibre Testing

Prepare the Testing Environment

Before conducting any fibre optic testing, it is important to prepare the testing environment properly. This involves ensuring that the testing area is clean, well-lit, and free from any debris or clutter.

It is also important to ensure that the testing equipment is set up correctly and that all cables and connectors are properly connected.

Preparing the testing environment properly can help ensure accurate and reliable test results and can help prevent any issues that may affect the testing.

Use High-Quality Equipment

Using high-quality testing equipment is essential for conducting effective fibre testing. This includes fibre optic testers, cleaning supplies, and other tools needed for testing.

High-quality equipment is more reliable and accurate and can help ensure that test results are consistent and repeatable.Investing in high-quality equipment can be expensive, but it is essential for maintaining the performance and reliability of fibre optic networks.

Cheaper equipment may seem like a more cost-effective solution, but it can be less reliable and accurate, leading to errors and inaccuracies in the test results.

Be Patient and Thorough

Fibre optic testing requires patience and thoroughness to ensure accurate and reliable results. Rushing through the testing or skipping steps can lead to errors and inaccuracies in the test results. It is essential to follow the testing procedures carefully and ensure that all steps are completed correctly.

Being patient and thorough can also help identify any issues or trends in the test results. Keeping accurate records of the testing results can help identify any changes or issues over time and can be useful for troubleshooting any problems that arise in the future.

Keep Accurate Records

Keeping accurate records of the fibre optic testing is essential for maintaining the performance and reliability of the network. This includes recording the testing procedures, equipment used, testing environment, and test results.

Accurate records can help identify any issues or trends and can be useful for troubleshooting any problems that arise in the future.

Conduct Regular Testing

Regular testing is essential for maintaining the performance and integrity of fibre optic cables. It is recommended to conduct testing at least once a year, or more frequently if the cables are subject to harsh environmental conditions or heavy usage.

Regular testing can help identify any issues early on and prevent more significant problems from occurring in the future.

Train Your Team

Proper training is essential for conducting effective fibre optic testing. Make sure that your team is adequately trained on the testing procedures, equipment usage, and safety protocols.

Regular training can help ensure that your team is up to date on the latest testing methods and techniques, and can help prevent errors and inaccuracies in the testing process.

Conclusion

Effective fibre testing is essential for maintaining the performance and reliability of fibre optic networks. By following the tips and tricks outlined in this article, you can ensure that your testing process is accurate, reliable, and efficient.
Investing in high-quality testing equipment and cleaning supplies, preparing the testing environment, being patient and thorough, keeping accurate records, conducting regular testing, and training your team are all important steps in conducting effective fibre testing.
Remember that proper fibre testing is not only important for maintaining the performance of your network but also for ensuring the safety of those who use it.