Fiber optic cable types, works, and functions
A fiber-optic cable uses long, thin strings of flexible glass to transmit data in the form of light. A fiber-optic cable holds this string in its center, allowing light to pass through the glass. The sender device converts data into light. The receiver device converts light into data.
Components of a fiber-optic cable
Core, cladding, buffer, strengthener, and outer jacket are the components of a fiber-optic cable. The outer coat, strengthener, and buffer protect the cable's interior and make it easier to install and manage. Cladding and core create the environment needed to transmit light along the cable.
How does a fiber cable work
The sender device converts data into light and uses an optical transmitter to send it into the core. The light passes through the core. The cladding protects the light from bouncing off the core. It reflects the light into the core. The receiver device reads the light signals and converts them back into the data.
Types of fiber optic cable
There are two types of fiber optic cable: single-mode fiber (SMF) and multimode fiber.
SMF
A single-mode fiber cable uses a core with a diameter that is one-fifth that of a multimode fiber cable. It uses a laser-based transmitter to send light into the core. It sends light at a single angle. Since it sends light at a single angle, it is called a single-mode fiber.
MMF
A multimode fiber cable uses a larger core than a single-mode fiber cable. It uses an LED-based transmitter to illuminate the core. It sends light at multiple angles. Since it sends light at various angles, it is called a multimode fiber.
Differences between SMF and MMF
| SMF | MMF |
| It uses a laser to illuminate the core. | It uses an LED to illuminate the core. |
| It provides a single path or angle for the light. | It offers multiple paths or angles for the light. |
| It uses a smaller core. | It uses a bigger core. |
| It is mainly used for longer distances. | It is primarily used for shorter distances. |
| It carries a single beam of light. | It holds multiple beams of light. |
| It costs more than the MMF. | It is cheaper than SMF. |
| SMF typically has a core diameter of 8.3 to 10 microns. | MMF typically has a core diameter of 50 to 100 microns. |
| If you prefer speed and performance over budget, this is the best option. | If you prefer budget over speed and performance, this is the best option. |
Characteristics and functions of a fiber optic cable
- A fiber-optic cable uses a thin strain of glass.
- It transmits data in the form of light.
- It is mainly used in the IT and telecom sectors.
- It is suitable for data and voice transmission.
- It is used to build LAN and WAN networks.
- It provides higher data transfer speed and costs less money than other available media.
Conclusion
Fiber-optic cables provide a significant advancement in data transmission technology. It utilizes glass strains to transmit information as light. With essential components like the core, cladding, buffer, strengthener, and outer jacket, these cables ensure efficient and reliable communication. There are two types of fiber-optic cables: SMF and MMF. SMF is ideal for long-distance communication. It offers higher performance. MMF is more cost-effective for shorter connections. Regardless of type, fiber-optic cables provide faster data transfer and support a wide range of networking applications.
Author Laxmi Goswami Updated on 2025-11-20