Researching WDM I came across this:
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Silkroad, Inc., which has just demonstrated
93 gigabits/second over a single 62-mile fiber, WITHOUT the need for
amplifiers to regenerate the signal along the way, and WITHOUT using
Wavelength Division Multiplexing! (WDM is the technique where a
single fiber carries many data streams, each a different "color" of
light generated by its own laser. WDM is currently deployed with 16
lasers per fiber, each producing a 2.5 gigabits/second data stream,
yielding a single fiber capacity of 40 gigabits/second.) Silkroad's
demonstration carried 830 channels of satellite programming over one
glass fiber.
According to Silkroad
(http://www.silkroadcorp.com/news/press_110298_fiberoptic.html),
their new, much less equipment-intensive "SRSC" technology, "can
transmit up to 200 gigabits/second as far as 200 miles on a single
wavelength on the same fiber cable," without amplification. And,
they expect that their transmitters and receivers will be able to
reach 10 terabits/second, the innate capacity of a fiber! First
products should ship late next year.
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Any comments?
Stang |
