Abstract
Extremely low loss in single mode fibers is attained at wavelengths between 1.5 and 1.6 μm. However, chromatic dispersion in this wavelength range combined with mode partition noise leads to errors which can only be avoided by use of stable single frequency lasers. Recently, repeaterless transmission at 44.8 Mb/s over 134 km has been achieved with 1.53-μm distributed feedback (DFB) laser.Extremely low loss in single mode fibers is attained at wavelengths between 1.5 and 1.6 μm. However, chromatic dispersion in this wavelength range combined with mode partition noise leads to errors which can only be avoided by use of stable single frequency lasers. Recently, repeaterless transmission at 44.8 Mb/s over 134 km has been achieved with 1.53-μm distributed feedback (DFB) laser.
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