The Function of Optical Cables

The Function of Optical Cables
The core function of optical cables: Utilizing optical signals to transmit information, serving as a transmission medium for high-speed communication. In simple terms, it is "using light instead of wires to transmit data".

I. Basic Principle
Inside the optical cable are optical fibers (glass threads). At the sending end, the electrical signal is converted into a laser signal, which is reflected and propagated forward within the core; at the receiving end, the optical signal is restored to an electrical signal to achieve the transmission of voice, video, and network data.
II. Main Functional Advantages
Extremely fast transmission speed, large bandwidth
Supports 10 Gigabit, dozens of Giga, or even hundreds of Giga-level high-speed transmission, making it the preferred choice for 5G, broadband, and backbone networks of data centers.
Long transmission distance
Optical signals have low attenuation and can be transmitted for tens of kilometers without adding repeaters or amplifiers.
Strong anti-interference ability
Light is not affected by electromagnetic interference. The signal remains stable in the presence of high-voltage lines, motors, and during thunderstorms, without generating noise or packet loss.
High confidentiality
Optical signals are difficult to be eavesdropped or intercepted, making them suitable for government affairs, finance, and backbone communications of operators.
Lightweight, low raw material cost, and no risk of leakage
III. Common Application Scenarios

Home/enterprise broadband, fiber-to-the-home (FTTH)
Operator backbone networks, long-distance communication trunk lines between cities
Connection between 5G base stations, from base stations to computer rooms
Interconnection of data center servers, wiring in cloud computer rooms
Long-distance transmission of security monitoring, industrial automation, and rail transit communication
Undersea optical cables: Cross-continental international internet communication