Abstract
We investigate 40-Gb/s cost-efficient transmitter for access and metro
networks. This 40-Gb/s transmitter comprises a standard directly modulated
distributed-feedback (DFB) laser and a subsequent optical filter. Large dispersion
tolerance of this transmitter is realized by chirp control through the phase
correlation between adjacent bits for the destructive interference in order
to erase the power of “0” bits while enhancing the extinction
ratio. The chirp model of the DFB laser and the optimum parameters of the
optical filter have been numerically analyzed. The chirp-managed 42.8-Gb/s
transmission over 20-km standard single mode fiber (SSMF or SMF-28) without
dispersion compensation and a centralized lightwave WDM-PON system are experimentally
demonstrated. We have also realized the transmission over 100-m graded index
plastic optical fiber (GI-POF). Moreover, the application in the metro network
over 240-km SSMF or SMF-28 has also been investigated in this paper.
© 2009 IEEE
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