What does monomode mean?
Monomode is a technical term used chiefly in telecommunications to describe optical fibre that carries light in a single propagation mode. Because the light follows one defined optical path, monomode fibre experiences less modal dispersion and can transmit signals over greater distances at higher bandwidth than multimode fibre. It is therefore commonly used for long-distance links, data centres, and other networks in which preserving signal quality is important. The adjective normally appears in established phrases such as “monomode fibre” or “monomode optical fibre,” while “single-mode” is also widely understood. The term should not be confused with multimode, which supports several propagation modes and is generally more suitable for shorter connections. Although monomode can function as a noun referring to such a fibre or system, its use is much more frequent as an attributive modifier.
Supporting or using only one optical propagation mode, especially in relation to optical fibre.
"The technicians installed monomode fibre between the two sites."
Usually appears attributively, particularly in “monomode fibre” and “monomode optical fibre.”
An optical fibre or optical-fibre system that supports a single propagation mode.
"A monomode was selected for the long-haul connection."
The noun form is less common than the adjectival use in modern technical writing.
The plural is used when referring to multiple monomode fibres or systems, although the adjective is more common.
"The two monomodes connect the office to the data centre."
A monomode fibre gives light one optical route to follow, helping it travel farther with less signal loss than multimode fibre.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Where does monomode come from?
The word combines the combining form mono-, from Greek monos, meaning “single” or “alone,” with mode, from Latin modus, meaning “measure,” “manner,” or “way.” In optics, mode refers to a distinct spatial and propagation pattern through which electromagnetic energy can travel. The compound developed as the opposite of multimode as fibre-optic communication became widely used.
Related word forms
How monomode is actually used
This is specialist telecommunications terminology. It is especially associated with optical networking, and the expression “single-mode fibre” is widely used as an equivalent or clarifying alternative.
Easily confused with monomode
Monomode supports one optical propagation mode, whereas multimode supports multiple modes and is generally used for shorter-distance links.