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We propose and experimentally demonstrate a reflective semiconductor optical amplifier (RSOA)-based Mach–Zehnder interferometer structure for generating high-order ultrawideband (UWB) signals. First, low-order UWB signals are generated by controlling the bias current of the RSOA. To convert the generated low-order UWB signals to high-order UWB signals, the polarization overlaying technique is used...
We have experimentally demonstrated symmetric 40Gb/s TWDM-PON with long passive reach and high power budget. Directly-modulated lasers (DMLs) are used as both downstream and upstream lasers to reduce the system cost, and optical reshaping filter is used to manage the chirp of the DMLs for all the upstream and downstream channels, enabling long distance transmission without dispersion compensation...
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