Fiber optic cables are inherently immune to EMI and alien crosstalk due to their glass core and light-based transmission. Therefore, shielding is not necessary for fiber optics. They play a vital role in electromagnetic compatibility (EMC)—ensuring that electronic systems can operate reliably without being affected by or emitting. As is commonly known, fiber-optic cabling is immune to the effects of EMI/RFI as its information-carrying element is a glass fiber. However, it is a common mistake among design engineers not to consider equipment shielding when using fiber-optic interconnects. Does this kind of cable require shielding for home use or for infrastructure use? Side note: By shielding i mean limiting the amount of noise that the signal in the cable is getting from external factors (sun, power lines, radio. However, if you need to shield the electrical equipment served by the fiber optics from electromagnetic interference, you must meet the challenge in a completely different way. The main difference between fiber and ordinary cables and metal pipes is that optic fibers are built-up by glass and. Shielded cables (STP, or Shielded Twisted Pair) come with an additional layer of protection —a metallic shield—that surrounds the internal wire pairs.
