Optical fibre are used at specific wavelength

Optical fibre are used at specific wavelength. Multimodes fibre are mainly used at 850 nm and 1,300 nm and Singlemode are used at 1,310 nm and 1,550 nm. The attenuation performances are better at the higher bandwidth with consequentl improved transmission performances.

Optical fiber can be provided with different characteristics. Indeed the performance need for fiber in patch cord or fiber over one kilometer link are obviously different. The fiber choice is based on optical parameters such as attenuation, bandwidthperformances and chromatic dispersion.

Different international standards are available to describe the optical fiber characteristics: ITU G652 for Singlemode fiber and IEC 60793-2-10 for Multimode fibre are worldwide references.

November 12, 2011

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