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Standard chromatogram of optical fiber core

The standard chromatogram of an optical fiber core is a color-coded sequence used to identify individual fibers, typically following the order: blue, orange, green, brown, gray, white, red, black, yellow, purple, pink, and cyan.

Overview of Fiber Core Chromatography

Optical fiber cores within a cable are identified using a color-coding system, known as a chromatogram. This system ensures that each fiber can be easily distinguished during installation, splicing, and maintenance. The color sequence is standardized internationally and nationally to maintain consistency across different manufacturers and cable types.

Standard Color Sequence

The full-color standard sequence for fiber cores, as defined by BELLCORE and widely adopted, is: BlueOrangeGreenBrownGrayWhiteRedBlackYellowPurplePinkCyan For cables with more than 12 cores, multiple loose tubes are used, each following the same color sequence. The colors are typically matched to the Munsell color scale, ensuring uniformity in identification.

Variations and Special Arrangements

Loose Tube Chromatography: In loose tube cables, the fibers inside each tube follow the same color sequence. If the number of fibers is less than 12, the sequence starts from fiber #1 and continues sequentially. Pilot Chromatography: When a ripper rope is present inside the cable core, it is positioned near the red tube.

If only one loose tube is used, it is generally green unless specified otherwise. Natural Color Option: In some cases, the white fiber (#6) can be replaced with a natural color, referred to as the standard chromatogram W.

Importance

Using a standard chromatogram prevents errors during fiber splicing and network maintenance, especially in multi-core cables. It also facilitates compliance with international and national standards, ensuring interoperability between different cable manufacturers and network components. This color-coded system is essential for technicians and engineers working with fiber optic networks, providing a clear and reliable method to identify and manage individual fiber cores.

Standard chromatogram of optical fiber core
Do you know the chromatographic order of fiber optics?

BELLCORE''s national standard fiber core sequence is: Blue, orange, green, brown, gray, white, red, black, yellow, purple, pink, cyan; The color scale must comply with the Munsell color

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Do you know the chromatographic order of fiber optics?

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Technical note

This reference is intended for preliminary fiber and communications infrastructure research. Optical interface, fiber type, port or core capacity, electrical input and output, enclosure protection, cooling, installation limits and applicable standards must be verified for the specific project.

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