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Long term stability of aerial optical cables with respect to gigabit/s data rates

For the extension of existing optical fiber links to higher data transfer rates in the multi-gigabit range and the expected higher power density due to DWDM one must consider possible limitations of the deployed cables. Many investigations have identified polarization mode dispersion PMD as a crucial parameter especially for cables exposed to environmental stresses. Three aerial optical fiber cable links were characterized by measuring PMD, optical time domain reflectometry OTDR, polarization-OTDR, and bit error rate BER. Measurement results over several days are correlated to temperature data from weather stations along the cable lines.