The expected development of advanced video services with HDTV quality demands the delivery of more than Gb/s link
to end users across the last mile connection. Future access networks are also required to have long reach for reduction in
the number of central offices (CO). Fueled by those requirements, we propose a novel equalization scheme that increases
the capacity and reach of the wavelength division multiplexing passive optical network (WDM-PON) based on a low
bandwidth reflective semiconductor optical amplifier (RSOA). We investigate the characteristics of 10 Gb/s upstream
transmission in WDM-PON using RSOA with only 1.2 GHz electrical bandwidth and various lengths of fiber. It is
proven that the proposed four-level partial response equalizer (PRE) is capable of mitigating the impact of ISI in the
received signals from optical network units (ONU) located 0 km to 75 km away from the optical line terminal (OLT).
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