Overview / Description
          TrueWave RS reduced dispersion slope fiber is an ITU-T G.665 compliant fiber designed for regional and metropolitan optical transmission systems. With the lowest dispersion slope amongst NZDFs in the industry, TrueWave RS fiber enables performance in Dense Wavelength Division Multiplexing (DWDM) systems traditionally operating in the C-band (1530 nm - 1565 nm), as well as in emerging L-band (1565 nm - 1625 nm) systems.

          The low dispersion slope found in TrueWave RS fiber improves performance and lowers total network cost by reducing the need for complex and expensive dispersion compensation a problem that can arise with other NZDFs, particularly those that have large effective areas. TrueWave RS fiber's low dispersion and dispersion slope combine to allow the longest uncompensated reach for metropolitan and regional networks operating at 2.5 or 10 Gb/s.

          The low dispersion slope also enables more accurate compensation as the need arises. As a result, TrueWave RS fiber has much lower residual dispersion than other NZDFs, with is critical for next generation optical cross-connect based networks, such as optical transport network, and for supporting a migration to 40 Gb/s data rates.

Uniform and optimum performance with a low dispersion slope

          The chromatic dispersion of all fibers changes with wavelength, with the rate of change expressed as dispersion slope. The smaller the dispersion slope, the less dispersion changes with wavelength. For high speed, multi-channel DWDM networks, a lower dispersion slope enables more uniform and optimum performance across the entire wavelength band. Another advantage to TrueWave RS fiber's low dispersion slope is around the phenomenon of Four Wave Mixing (FWM), Very low dispersion, which can happen at the lower end of the C-band in NZDFs with high dispersion slope, can result in FWM and degradation of multi-channel DWDM systme performance. Because of its low dispersion slope, TrueWave RS fiber allows its minimum dispersion to be increased in this region to better suppress FWM, while keeping the fiber's maximum dispersion small enough for signals to travel over long distances with minimum need for costly dispersion compensation.

          Clearly, minimizing dispersion compensation costs benefits the total system cost for regional and metro express networks. See your OFS representative to hear about the latest system demonstration that illustrates TrueWave RS fiber's capabilities.