This letter discusses optical beat interference (OBI) and shows the efficiency in reducing this OBI in the broad-band passive optical network (BPON) by using an extra-strong modulation sine wave. The results show that the optical interference can be reduced to acceptable levels. After calculation, the network with the extra-strong modulation sine wave can be extended to 12 optical network units (ONUs).
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Wen‐Piao Lin (1997) studied this question.
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