Devices used to convert electrical signals into optical signals for transmission over optical fibers.

Prepare for the Telecom Room Cross-Connection Facility Test. Utilize flashcards and multiple choice questions, complete with hints and elucidations. Gear up for your assessment!

Converting electrical signals into light for transmission over fiber is done by the optical transmitter. It includes a light source—such as a laser diode or an LED—and a driver that modulates that light to follow the input electrical signal. This process, called electrical-to-optical conversion, encodes the data into photons so the fiber can carry it efficiently. At the other end, the optical receiver performs the reverse, turning the light back into an electrical signal. The other terms don’t describe a device that converts electricity to light: a dielectric constant is a material property, and common mode current is an unwanted electrical current path.