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What do the fiber terms 9/125, 50/125 and 62.5/125 refer to?

What do the fiber terms 9/125, 50/125 and 62.5/125 refer to?

Fiber Core Sizes

These terms refer to the diameter in microns of a fiber optic cable's core and cladding.

The first set of numbers - 9, 50 and 62.5 refer to the diameter of the fiber cable's core.

The second set of numbers - 125 refer to the diameter of the outside of the fiber cable's cladding.

The cladding is a special coating that keeps the light from escaping the glass core.

9/125 refers to a single mode fiber cable. 50/125 and 62.5/125 refer to multimode fiber cable.

View a Fiber Optic Tutorial explaining terms, optical transmission and commonly used fiber optic connectors.

View a Fiber Optic Tutorial explaining how to select the right type of Fiber Optic cable, bandwidth and application differences between copper and fiber optic cabling, and polish types and typical back reflection.

View L-com's complete offering of Fiber Optic cables, adapters and more.

Video: How to clean a fiber cable

View more tips and videos.

  
    
 
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