Yes, fiber optic communication requires cables, as the data is transmitted as light pulses through optical fibers encased in protective cabling.

Fiber optic communication works by sending pulses of light through optical fibers, which act as the medium for carrying information over long distances with minimal signal loss and high bandwidth . These fibers are extremely thin strands of glass or plastic, often no wider than a human hair, and are designed to guide light using total internal reflection between the core and cladding layers . To protect these fragile fibers and ensure reliable transmission, they are bundled into fiber optic cables, which include multiple layers such as a buffer coating, strengthening fibers, and an outer jacket . The cable structure prevents physical damage, moisture intrusion, and signal interference, making it suitable for various environments, from indoor networking to long-distance telecommunications . While the concept of transmitting light without cables exists in free-space optical communication, practical fiber optic communication for internet, telephone, and cable TV networks relies on physical fiber optic cables to maintain high-speed, long-distance, and interference-resistant data transmission . In summary, fiber optic communication inherently depends on cables to house and protect the optical fibers that carry light signals, making them essential for most real-world applications.