An optical receiver is a device that converts light signals traveling through fiber optic cable back into electrical signals that electronic equipment can process. It's the endpoint of any fiber optic link, sitting at the far end of the cable and translating pulses of infrared light into the ones. Fiber-optic communication is a form of optical communication for transmitting information from one place to another by sending pulses of infrared or visible light through an optical fiber. Fiber is preferred. In an optical fiber communication system, the data is transmitted in the form of light signals. In addition, it uses a low-power optical detector, preamplifier, and AGC (Automatic Gain Control) technology to.