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An Optical Multicast Overlay Scheme for a WDM PON Using Inverse-RZ-Duobinary Signals

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4 Author(s)
Zhixin Liu ; Dept. of Inf. Eng., Chinese Univ. of Hong Kong, Hong Kong, China ; Yang Qiu ; Jing Xu ; Chun-Kit Chan

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 is used to receive the point-to-point and the multicast data, which lead to low-cost and colorless optical network units. The 10-Gb/s downstream operation of the proposed optical multicast overlay scheme and 2.5-Gb/s carrier distributed upstream transmission have been experimentally demonstrated.

Published in:

Photonics Technology Letters, IEEE  (Volume:23 ,  Issue: 4 )