Which technology is commonly utilized to extend the distance of fiber optic signals?

Optical amplifiers are a critical technology used to extend the distance of fiber optic signals. They work by amplifying the light signals transmitted through the fiber without the need to convert them back into electrical signals. This process enables the signal strength to be boosted, allowing it to travel longer distances without degradation due to attenuation, which is the gradual loss of signal strength as it propagates through the fiber.

In comparison, while signal repeaters can also extend distances, they rely on converting the optical signals to electrical signals for amplification before re-transmitting them as optical signals again. This process can introduce latency and reduce overall system efficiency. Network routers primarily function at the network layer to manage data traffic and do not enhance the optical signal's travel distance. Fiber optic transceivers, while essential for connecting optical fiber to other types of networks and converting signals, do not serve the specific purpose of extending signal distance in the way that optical amplifiers do. Therefore, optical amplifiers are the preferred choice for maintaining signal integrity over long distances in fiber optic communication systems.