What method is there to measure the length of the optical cable? At present, the more commonly used optical cable length measurement technology is to use the time delay of the optical fiber in the optical cable to transmit the optical signal to indirectly obtain the optical fiber length. There are two main methods: single-ended measurement and link loopback measurement.

(1) Single-ended measurement

The existing single-ended fiber length measurement system is mainly an optical time domain reflectometer (OTDR), which inverts the fiber length through the back-and-forth reflection time of the optical pulse. Due to the limitation of the timing system, when the measured fiber length is short, the The error is large or cannot be measured.

(2) Link loopback measurement

The visual fiber length tester uses jumper loopback at one end of the fiber optic link, and can quickly and easily test the length of the fiber optic link at the other end. It provides an accurate, simple, time-saving and money-saving measurement method for installation and maintenance of optical cable links, and is the most commonly used instrument in optical cable testing tools.

The above is the relevant introduction of "What method is there to measure the length of the optical cable?", I hope it can help you.