What is Single Mode Fiber Optic Cable?

What is Single Mode Fiber Optic Cable?

If you’re wondering what is single mode fiber optic cable, then you’ve come to the right place. It’s an optical cable made of glass with a small core and one mode of light propagation. It’s also known as fundamental mode or mono-mode. This article will help you understand what it is and how it differs from other types of optical cables.

Single-mode fiber optic cable

Single-mode fiber optic cable is a type of fiber optic cable that carries light. Also called fundamental-mode or mono-mode, single-mode fiber is designed to transmit and receive a single mode of light. This type of cable can be used for a variety of applications. It is also more efficient than multimode cables in some situations.

Single-mode fiber optic cable is an excellent choice for long-distance transmission. It is also better suited to limiting the dispersion of data and external interference. It can support data transmission speeds of 10Gbps, 40Gbps, and even 100Gbps. However, because of its smaller core diameter, single-mode fiber is more expensive than multimode cable.


There are two basic types of fiber optic cable: single mode and multimode. Both types use glass as the core material, and optical waves travel through the glass in a specific mode. Their transmission characteristics are determined by their refractive indices and the inner diameter of the glass strand.

Glass optical fibers are ideal for long-distance communication. Their high-bandwidth signal transmission is immune to electromagnetic interference, and their flexibility makes them ideal for tight spaces and industrial environments.

One mode of light propagation

Single mode fibers have a uniform transverse intensity profile at the output. This is independent of the launch conditions and spatial properties of the injected light. A single-mode fiber can carry a high amount of power without the interference caused by multiple modes. It is also possible to introduce two or more modes into the same fiber.

The core of a single-mode fiber is very small – about eight to ten microns. This allows light to travel in one direction only, which reduces light reflections and attenuation. This is why single-mode cables are best suited for longer distances and higher bandwidths. Single-mode fibers are usually 9/125 in construction, which means that the core diameter is smaller than the cladding diameter.


The cost of single mode fiber optic cable is higher than that of multimode fiber optic cable. However, the benefits of fiber optics outweigh the cost. The high speeds are made possible thanks to their ability to carry up to five million phone calls at once. Although the process is expensive and difficult, it is well worth the extra money you’ll pay.

The cost of fiber optic cable installation depends on many factors. The type and length of the cable, the number of strands, and the terminations all contribute to the cost. For example, the cost of installing a single-mode fiber optic link in an office building can range from $15,000 to $30,000.


Single mode fiber optic cable is a type of fiber optic cable that uses one mode of light propagation to transmit information. This reduces the attenuation and allows the signal to travel further. This type of cable is often used for long distance, high bandwidth runs. It also comes with a small diametral core.

The core of a single mode fiber optic cable plays an important role in the quality of the signal. The smaller the core, the longer the signal can travel without degradation. Single-mode fibers have very small cores and can reach distances of 100 km or more. On the other hand, multimode fibers have a large core, which can lead to signal quality degradation over long distances.