1. An optimization method configured to optimize filter coefficients in pulse shaping filters in transmitters and matched filters in receivers to maximize a Q-factor of a channel of one or more channels in a fiber optic system, the optimization method comprises: iteratively adjusting filter coefficients of the pulse shaping filters and the matched filters to maximize a measured Q-factor of the channel; and setting the filter coefficients of the pulse shaping filters and the matched filters to optimized values based on the iteratively adjusting.