This paper discusses the fundamental principles of optical fi ber communication, key technologies such as lasers, optical amplifi ers, and photodetectors, and recent advancements in improving effi ciency, speed, and distance. Utilizing light waves to transmit information, this technology offers signifi cant advantages, including high bandwidth, low attenuation, and minimal interference compared. Basic configuration of an optical fiber communications system Compared to conventional metallic cables, optical fiber provides an advantage of low loss (~ 0. 2dB/km) and wide bandwidth (several hundred MHz to THz) to enable long-distance, high-capacity communication. Additionally, optical fiber is. In the demonstration experiment, we demonstrated a high-capacity transmission of 455 terabits per second over a transmission distance of 53. 5km by applying large-scale MIMO 1 signal processing technology in a terrestrial field environment in which a 12-core fiber with the same diameter as existing.
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