Margaret Rouse is an award-winning technical writer and teacher known for her ability to explain complex technical subjects simply to a non-technical, business audience. Over…
Single-mode fiber is a common type of optical fiber that is used to transmit over longer distances. It is one of the two optical fiber types, the other being multi-mode fiber. A single-mode fiber is a single glass fiber strand used to transmit a single mode or ray of light.
Single-mode fiber features only one transmission mode. Compared with multi-mode fiber, it can carry higher bandwidths; however, it needs to have a light source having a narrow spectral width.
Single-mode fiber is also known as a single-mode optical fiber, uni-mode fiber, mono-mode optical fiber and single-mode optical waveguide.
Single-mode fiber provides users with a greater transmission rate in addition to nearly 50 times longer distance as opposed to multi-mode fiber. However, single-mode fiber is more expensive than multi-mode fiber. Among all the differences between single-mode and multi-mode 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 single-mode fiber is much smaller than that of multi-mode fiber. There are three fundamental diameter sizes for fiber cores.
Single-mode fiber 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 a minimal signal attenuation plus the highest transmission speed.
In contrast, multi-mode 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 a multi-mode fiber, it may result in a 20-dB loss, which is 99% of the total power.
Techopedia’s editorial policy is centered on delivering thoroughly researched, accurate, and unbiased content. We uphold strict sourcing standards, and each page undergoes diligent review by our team of top technology experts and seasoned editors. This process ensures the integrity, relevance, and value of our content for our readers.
Margaret is an award-winning technical writer and teacher known for her ability to explain complex technical subjects to a non-technical business audience. Over the past twenty years, her IT definitions have been published by Que in an encyclopedia of technology terms and cited in articles by the New York Times, Time Magazine, USA Today, ZDNet, PC Magazine, and Discovery Magazine. She joined Techopedia in 2011. Margaret's idea of a fun day is helping IT and business professionals learn to speak each other’s highly specialized languages.
What is a WebSocket? A WebSocket creates a persistent, bidirectional communication channel between a web browser and a server. This...
Marshall GunnellIT & Cybersecurity Expert
What is whoami? whoami is a command-line utility program for computers. It answers the question, "Who am I logged in as?" and...
Margaret RouseTechnology Expert
What is Backhaul? Backhaul is the process of transmitting data signals from remote locations or networks back to central ones...
Kuntal ChakrabortyTechnology Writer
Trending NewsLatest GuidesReviewsTerm of the Day