OTDR Launch Boxes for Accurate Fibre Testing

What is OTDR Launch Box

An OTDR Launch Box is a tool used in testing fibre optic cables. It connects an Optical Time Domain Reflectometer (OTDR) to the fibre being tested. Its main job is to remove “dead zones,” where the OTDR can’t find problems because of too much signal power or other issues. 

Using a launch box helps testers get more accurate readings, allowing the OTDR to work better and check the fibre’s performance without interference from other connections or faults. This tool is important for keeping fibre optic networks working well and fixing issues.

With a range of affordable options available, investing in a launch box is a cost-effective way to enhance testing accuracy and ensure reliable network performance.

Types of OTDR Launch Boxes

OTDR launch boxes come in various lengths and fibre types, making them suitable for different testing needs. Common lengths include 100m, 150m, 500m, and even up to 2000m.

A 100m launch box is ideal for short-distance tests, while a 2000m box is better for longer runs, providing more accurate measurements by minimizing the “dead zone” where the OTDR cannot detect signals. 

Types

Single-Mode Fibre: Typically has a core diameter of 9/125µm and is used for long-distance communication, such as connecting cities. It allows for high-speed data transmission over great distances with minimal signal loss.

Multimode Fibre: Available in various core sizes, such as 50/125µm and 62.5/125µm, this type is used for shorter distances, like within buildings or campuses. Multimode fibres support multiple light paths, making them suitable for local area networks.

Each type of launch box and fibre serves unique purposes, ensuring accurate

Functions

The main functions of an OTDR launch box include:

• Eliminating Dead Zones: It helps to reduce the “dead zone” effect, allowing for more accurate measurements by providing a buffer between the OTDR and the fibre under test.
• Improving Measurement Accuracy: By stabilizing the launch pulse, it enhances the accuracy of the readings taken by the OTDR, ensuring reliable data for fibre optic testing.
• Measuring Connector Loss: The launch box allows for the assessment of insertion loss and reflectance at the near-end connection, helping to identify potential issues.
• Protecting the OTDR: It safeguards the OTDR from damage caused by high launch power or reflections that could interfere with testing results.

Choosing the Right OTDR Launch Box

When picking the right OTDR launch box, customers should think about a few important things to make sure it fits their testing needs:

• Length of fibre: Choose the right length of fibre for your work. Common lengths are 100m, 150m, and up to 2000m. A longer fibre helps cover dead zones and gives more accurate measurements, so pick a length that is longer than the dead zone of your OTDR.
• Fibre Type: Select the right fibre type for your testing. Launch boxes come for both single-mode and multimode fibres. Single-mode fibres work best for long distances, while multimode fibres are better for shorter distances, like local networks.
• Connector Compatibility: Make sure the connectors on the launch box match both your OTDR and the fibre you are testing. Common types are SC, LC, and FC. Also, check that the polishing type (APC or UPC) matches your equipment.
• Durability and Portability: Look at how the launch box is built. It should be tough and easy to carry, especially if you will use it in different places. A compact and strong launch box will last longer during testing.

By considering these points, customers can choose an OTDR launch box that fits their needs and improves the accuracy of their fibre optic tests.