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We propose and demonstrate an optical multicast overlay scheme on a wavelength-division-multiplexed passive optical network, employing bandwidth efficient inverse return-to-zero-duobinary signals. Multicast control is realized by tuning the voltage bias at the point-to-point downstream modulator at the optical line terminal. At the optical network unit, one photodetector with two decision modules...
An 80-km-reach WDM PON with 10-Gb/s downstream and 2.5-Gb/s upstream re-modulated signals is demonstrated. The dispersion tolerant Inverse-RZ-Duobinary is employed as the downstream format while upstream ASK re-modulation is performed by reflective SOA.
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