Electronic dispersion compensation ICs for high speed long haul lightwave systems

Transversal filters are a sub-class of finite impulse response (FIR) infinite impulse response (IIR) filters. By using FIR-IIR filters one can reduce filter order and compensate for a larger variety of dispersion. It is shown that the IIR filter can be used to compensate for chromatic dispersion. An example will be given of a 120 km dispersion limited 10 Gb/s system in which the UR filter was able to compensate for chromatic dispersion to extend the reach to 210 km. An implementation of a FIR-IIR MMIC is also shown and discussed