40G and 100G products continue to grow


While 10G will continue as the largest market in both
revenue and units, LightCounting expects sales of 100G DWDM line cards to grow
to $2.3 billion by 2015, according to LightCounting.



At the same time, a new market for 40GigE and 100GigE
client-side optical transceiver modules is developing, and LightCounting
forecasts the market for those devices will grow to $380 million by 2015.



This report
examines the development of 100G DWDM line-side technology and standards for
100G on both the line side (DWDM) and client side (Ethernet). It looks at
trials and initial deployments of 100G technology as well as offerings from
system, module and communications IC suppliers.



It addresses the market opportunity for 40 and 100GE in
the datacenter and takes a look at some of the activity to develop 100G direct
detection alternatives to DP-QPSK with coherent detection. The report also



LightCounting forecasts for both client-side and
line-side 40G and 100G technology as well as an evaluation of current market
pricing. Finally, it presents some of the ongoing research in developing
optical transmission technology beyond 100G.



The technology used for 100G DWDM line-side connections
provides higher spectral efficiency than 10G or 40G transmission techniques.
That ultimately will make 100G desirable for carrier networks, but the impact
of 100G on carrier networks will go far beyond spectral efficiency.



The performance of the transmission technology selected
for 100G, DP-QPSK with coherent detection, is the first optical transmission
technology based on digital signal processing. This means the line card can
provide remote real-time monitoring of optical layer performance in terms of
span loss, latency, chromatic dispersion, PMD, and pre and post FEC BER. In
addition, software and hardware in the 100G line card implements a tunable
receiver. Under software control, the receiver can select the particular wavelength
channel to use.



Some vendors are even talking about taking things a step
further by adding digital control of transponder characteristics that are
similar to what software-defined radios bring to RF networks. A 100G
transponder may ultimately be able, under software control, to change
performance characteristics to adapt to changing conditions and traffic loads.
Together with tunable laser transmitters, 100G line cards will provide the
first fully tunable transponders in the network.



It’s not a big leap to imagine these fully tunable
transponders paired with grid-flexible, directionless, colorless ROADMs and
management software to create truly intelligent, configurable optical networks.
This flexibility would allow dynamic reallocation of resources and provide
greater network efficiency–it would enable the capacity, intelligence, and
flexibility that have been dreamed about for optical networks for over a



By Telecomlead.com Team

[email protected]