What is a common tool used to test fiber optic connections?

The use of an Optical Time Domain Reflectometer (OTDR) is crucial in testing fiber optic connections due to its ability to provide detailed information about the integrity and performance of the fiber. An OTDR works by sending a pulse of light into the fiber and measuring the fluctuations in the light that is reflected back. This allows technicians to identify various parameters such as the length of the fiber, the location of any breaks or faults, and the overall quality of the connection.

This instrument is particularly useful in troubleshooting and verifying the performance of installed fiber networks, as it can help pinpoint the exact location of issues along the cable run, making it an invaluable tool for ensuring that fiber optic communications are functioning correctly.

While tools like a fiber cleaver, cable stripper, and tunable laser are important in the fiber installation process—each serving specific purposes such as preparing fiber ends for splicing, removing insulation, or testing transmission—they do not provide the comprehensive analysis of connection integrity and performance that an OTDR offers. Thus, the OTDR stands out as the common tool primarily used for testing fiber optic connections.