A receiver includes a filter capable of receiving an input signal and generating an output signal. The sediment thus treated may be incorporated into concrete or mortar formulas, which then have leachable fractions of less than 1% by weight. A shock absorbing insert is then placed between the two halves to protect any filtering components or assemblies located within the magjack housing. The n-channel TFET includes an n-type region, a p-type region with a p-type delta doping, and a channel region disposed between and spacing apart the n-type region and the p-type region. Four-wave mixing is reduced by ensuring that the zero-dispersion frequency of the transmission fiber is not centered between the pump frequency and a frequency experiencing Raman gain.