What is Single Mode Fiber Optic? You Should Know

What is Single Mode Fiber Optic? Singlemode Fiber Optic is a common type of optical fiber that can transmit data networks over longer distances. It is one of the two optical fiber types, the other being the Multimode Fiber Optic. The Singlemode fiber is a single glass fiber strand that aims to transmit a Singlemode or ray of light.

Fiber optic a type of cable that uses glass fiber as the transmission medium. In contrast to cables in general, which use copper as the transmission medium and the carrier signal is in the form of digital or analog waves. Fiber Optic uses light waves as a carrier signal so it is claimed to have the highest speed among other cable types. This is reasonable considering that light is a wave that has a fast propagation speed. It is used in the telecommunications world to transmit data at a high speed as well as being the most stable communication.

What is Single Mode Fiber Optic?

What is Single Mode Fiber Optic?

Singlemode fiber features only one transmission mode. Compared with Multimode fiber Optic, it can carry higher bandwidths; however, it needs to have a light source having a narrow spectral width.

Optical fiber communication depends on the principle of light on a glass medium and can carry much more information and longer distances than electrical signals carried by copper or coaxial media. The purity of the glass fiber combined with an advanced electronic system allows the fiber to transmit digital light signals over a distance of 100 km without amplifiers. Optical fiber is an ideal transmission medium with little transmission loss, low interference, and high bandwidth potential.

General Fiber Optic Section Structure:

  • Core: The core of the optical fiber that functions as a transmission medium, this section is made of glass fiber or silicon glass with a diameter of 2 m – 50 m.
  • Cladding: This part is also made of silicon glass but has a lower refractive index than the core. This part serves as a reflector of light waves.
  • Coating/Buffer: This part is made of polymer material which serves as a protection from physical disturbances that may occur such as bent cables, moisture, etc.
  • Strength Member and Outer Jacket: The outermost layer of fiber optic which also functions as a protector. Usually made of woven or plastic.

Singlemode fiber is also known as a Singlemode optical fiber, uni-mode fiber, mono-mode optical fiber, and Singlemode optical waveguide.

Further Descriptions of What is Single Mode Fiber Optic?

Let’s start from the beginning, What is Single Mode Fiber Optic? Singlemode fiber optic provides users with a greater transmission rate in addition to nearly 50 times longer distances as opposed to multimode fiber optic. However, Singlemode fiber is more expensive than multimode fiber optic. Among all the differences between Singlemode and multimode fibers, the most basic is the size difference in the fibers’ core as well as the associated loss or attenuation and fiber bandwidth.

The optical fiber itself includes three fundamental parts: the core, the cladding, and the coating or buffer. The most central part of the optical fiber is the core. This is the place through which the light travels. The core of the Singlemode fiber is much smaller than that of Multimode fiber.

Singlemode fiber optic features a core diameter of nominally 9 µm, whereas multi-mode fiber often features a 62.5-µm or 50-µm core diameter. The small core, coupled with a single light wave, eradicates any distortion caused by overlapping light pulses, offering minimal signal attenuation plus the highest transmission speed. In contrast, multimode fiber provides users with high bandwidth at high speeds across moderate distances.

It is not advisable to mix and match fibers. If you try to connect a single-mode fiber with multimode fiber, it may result in a 20-dB loss, which is 99% of the total power.