Abstract
Feature Issue on
Optical Access Networks (OAN)
We describe two schemes developed to
carry very-high-data-rate DSL (VDSL) signals over a fiber to the cabinet
architecture for the upgrade of legacy copper networks. The first technique exploits
the subcarrier bandwidth of uncooled semiconductor lasers for the transmission of
multiple VDSL signals by using inexpensive interfacing hardware in the optical
network unit (ONU). With a hybrid fiber-copper link comprising 100 m of twisted-pair
copper cable and as much as 45 km of single-mode fiber, data transmission comparable
with that for fiber to the home is achieved. In an extension to this design we
demonstrate a system using a reflective semiconductor optical amplifier in a
carrierless remote ONU configuration. Such a design might provide wavelength agility
in the fiber access network for signal routing or active bandwidth
allocation.
© 2005 Optical Society of America
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