Copper vs. Fiber-Optic Cables: Key Differences Explained

Not all cables are the same. By definition, a cable is an assembly consisting of multiple wires or conductors. There are different types of cables, however, two of the most common being copper and fiber optic. While they both have multiple conductors, copper and fiber optic cables differ in several ways.

Construction

One of the most notable differences between copper and fiber optic cables is their construction. As their names suggest, copper cables are made of copper, whereas fiber optic cables are made of glass-based optical fibers. These optical fibers are much smaller than their copper counterparts. Single-mode optical fibers are typically 8.3 microns in diameter, whereas multimode optical fibers are 50 and 62.5 microns in diameter. To put those numbers into perspective, a strand of human hair is about 50 to 70 microns in diameter.

Applications

Copper and fiber optic cables are used in different applications. Copper is used for power and data transmission, whereas fiber optic is used strictly for data transmission. Copper is a highly conductive material. In fact, it’s the second-most electrically conductive metal, surpassed only by silver. With its conductive properties, copper is a very effective medium for power transmission.

Data Transmission Speed

Fiber optic cables offer faster data transmission speeds than copper cables. It’s not uncommon for customers of fiber optic broadband services to get 1 Gbps to 10 Gbps. Copper cables, on the other hand, often top out at around 1 Gbps. This alone is reason enough for many homeowners and business owners to choose fiber optic broadband services.

Method of Transmission

Another difference between copper and fiber optic cables is their method of transmission. While they are both capable of transmitting data, they use different methods. Copper cables send electrical signals. Fiber optic cables, in comparison, send light pulses. The light pulses travel through the glass-based optical fibers, allowing for significantly faster transmission speeds.

Durability

Both copper and fiber optic cables are durable, but they have their own unique advantages. Fiber optic cables, for instance, aren’t affected by electromagnetic noise. You can use them around electronics and other EMF sources without fear of signal loss. Copper cables offer excellent physical durability. They can withstand heat, sunlight and moisture, making them ideal for outdoor installations.

In Conclusion

The choice between copper and fiber optic cables comes down to the specific needs of the project. Copper is a time-tested solution known for its strength, electrical conductivity and versatility in both power and data transmission. Fiber optic, on the other hand, delivers unmatched speed, resistance to interference and long-distance performance.