How to test the fiber connecter

Testing fiber optic connectors is an essential part of any installation or maintenance process. Fiber optic connectors must be tested to ensure that they are installed correctly and can transmit data at the required speeds. In this article, we will discuss the steps to test fiber optic connectors.

Visual Inspection

Visual inspection is the first step in testing fiber optic connectors. This step involves examining the connector for any physical damage, contamination, or defects. Inspectors should use a fiber optic microscope with a magnification of at least 200x to examine the connector.

Inspectors should look for any scratches, cracks, chips, or other defects on the connector surface. They should also check for contamination on the connector end-face, such as dust, dirt, or oils. Any defects or contamination found should be addressed before proceeding with testing.

Clean the Connector End-face

Before proceeding with testing, the connector end-face should be cleaned using a proper cleaning tool. Clean the end-face with a lint-free wipe and a fiber optic cleaning solution to remove any contaminants.

Insertion Loss Testing

Insertion loss testing is the next step in testing fiber optic connectors. This test measures the amount of signal loss when a fiber optic connector is inserted into a mating adapter or connector. The test determines the quality of the connection and is an essential step in ensuring that the connector is installed correctly.

To perform the insertion loss test, use an optical power meter and a light source. Connect the light source to one end of the fiber optic cable and the power meter to the other end. Connect the connector to the adapter or mating connector and record the power reading on the power meter. Disconnect the connector and record the power reading again. The difference between the two power readings is the insertion loss.

The insertion loss should be within the acceptable range for the system. For example, the insertion loss for a single-mode fiber optic system should be less than 0.5 dB, while the insertion loss for a multi-mode fiber optic system should be less than 0.75 dB.

Return Loss Testing

Return loss testing is the next step in testing fiber optic connectors. This test measures the amount of reflected light that is sent back to the source due to poor connector mating or poor fiber cleaving. High levels of return loss can cause data errors and poor signal quality.

To perform the return loss test, use an optical time-domain reflectometer (OTDR). Connect the OTDR to one end of the fiber optic cable and record the reflected signal. A high level of return loss indicates poor connector mating or poor fiber cleaving and should be addressed.

Continuity Testing

Continuity testing is the final step in testing fiber optic connectors. This test checks if the fiber is continuous from end to end and can detect any broken or damaged fibers. Continuity testing is essential for verifying that the connector is installed correctly and is transmitting data correctly.

To perform the continuity test, use a continuity tester or an optical fiber identifier. Connect the tester to one end of the fiber optic cable and check if the signal is received at the other end. A successful continuity test indicates that the fiber is continuous from end to end.

In conclusion, testing fiber optic connectors is a crucial step in ensuring the reliability and performance of a fiber optic network. The testing process includes visual inspection, cleaning the connector end-face, insertion loss testing, return loss testing, and continuity testing. By following these steps, technicians can ensure that the connectors are installed correctly and are transmitting data at the required speeds.