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Simplex VS. Duplex Fiber Optic Cable

Date: 2024-01-22 15:50:00

Fiber optic cable is a crucial component in the fiber optic network. There are many types of fiber optic cable, such as single-mode fiber optic cable, multi-mode fiber optic cable, simplex fiber optic cable, duplex fiber optic cable, and more. This paper will focus on the difference between simplex and duplex fiber optic cables. 


Simplex VS. Duplex Fiber Optic Cables
Fiber optic cables come in numerous types that are manufactured to achieve the unique goals of the application. Let's take look at the main differences between simplex and duplex fiber optic cable types.

A simplex fiber optic cable consists of one single strand of glass of plastic fiber and one single outer jacket.  A duplex fiber optic cable consists of two strands of glass or plastic fiber, and it can be regarded as two simplex cables with their jackets conjoined by a strip of jacket material , usually in a zip-cord construction format. Simplex and duplex fiber optic cables are both made up of tight-buffered fiber, aramid yarn strength member, and jacket.


Simplex fiber offers a one-way data transfer. It’s a good choice for an application such as digital data readouts, interstate highway sensor relays, automated speed, boundary sensors, oil line monitors, fiber pigtails,  fiber patch cords and pigtails, and indoor applications.Fiber optic duplex offers bidirectional data transfer. It’s a good choice for applications such as telecommunications, workstations, ethernet switches, fiber switches and servers, fiber modems, fiber patch cords and pigtails, and indoor applications.

Single-Mode and Multi-Mode Fiber
Simplex and duplex fiber cables are available in single-mode and multi-mode fiber. Single-mode fiber is often better for long-distance applications because it carries one ray of light at a time. Multi-mode fiber has a larger diameter core and can transmit more data at a given time. However, it is better for shorter distances due to high dispersion and attenuation rates.
In addition, duplex fiber optic cables can be half-duplex and full-duplex. Half-duplex means that data can be transmitted in two directions but not simultaneously. Full-duplex means that data transfer can occur in both directions at once.

Simplex fiber optic cable uses only single one strand of fiber in one-way transmission mode, while duplex fiber optic cable uses a pair of fibers in bi-directional transmission mode. Duplex fiber optic cable is more expensive than Simplex fiber optic cable because it uses more materials. Also, simplex fiber optic cable provides high speed than duplex fiber optic cable.

Simplex and duplex fiber cables provide a high-quality tight buffered or loose tube, aramid yarn strength member, and jacket, soft and easy to strip, round structure, and convenient installation and simple operation. Sun Telecom is specialized in providing solutions and simplex and duplex fiber optic cable products for global markets.

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