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Sanjib.Acharya
Hi Chanj, I agree with you. The cost of replacing or upgrading the existing ...
chanj
There will be more bandwidth hunger applications in the foreseeable future. Any ...
Infinera transmits 100-G more than 800 miles
Peter Clarke
9/3/2010 9:45 AM EDT
LONDON – Networking equipment supplier Infinera Corp. has said it has achieved 100-Gbit/s coherent transmission of data over a 1,348-kilometer (about 838 miles) route on the XO Communications network.
The trial used 500-Gbit/s (500G) photonic integrated circuits (PICs) which each integrate five 100-G channels. The 500-G PICs were used for both transmitting and receiving a 100G signal on a route between Denver and Dallas on the XO (Herndon, Virginia) optical fiber network. The 500G PICs incorporate more than 600 optical elements on a pair of indium phosphide chips, Infinera (Sunnyvale, Calif.) said.
The 100G channel was transmitted using phase modulated quadrature phase-shift key (PM-QPSK) modulation and coherent detection to enable unrepeatered transmission over the long haul distance.
"XO Communications looks forward to the increased capacity and superior efficiency we anticipate these 100G systems will deliver, as we work to meet growing bandwidth demands from our enterprise and wholesale service provider and mobile wireless customers," said Randy Nicklas, CTO of XO Communications, in a statement issued by Infinera.
Related links and articles:
Cisco buys CoreOptics for $99 million
Telecom providers hungry for 100G, but price averse
Intel debuts optical link for PCs
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iniewski
9/3/2010 11:15 AM EDT
InP based photonic circuits sounds cool. But 100Gb/s transmission over 800 miles had been shown in the past using soliton technology. Am I missing something here? Kris
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Sanjib.Acharya
9/4/2010 4:52 AM EDT
Hi Kris, I don't remember or might have missed such news about any previous successful attempt of 100Gb/s transmission over 800 miles. It will be helpful if you could direct me to any link you might remember?
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Sanjib.Acharya
9/4/2010 4:53 AM EDT
Hi Kris, I don't remember or might have missed such news about any previous successful attempt of 100Gb/s transmission over 800 miles. Could you please direct me to any link you might remember?
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GREAT-Terry
9/5/2010 12:03 PM EDT
It is great to see such break through. Just don't know how much it costs. Will this solution be cheap enough?
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chanj
9/5/2010 10:50 PM EDT
There will be more bandwidth hunger applications in the foreseeable future. Any improvement in any area will indeed a great help. One of the biggest challenge today is still the last mile. To replace all last miles copper may not be so cost effective. Any new technology to address high speed delivering through regular CAT3 cable w/o substantial degradation?
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Sanjib.Acharya
9/6/2010 5:39 AM EDT
Hi Chanj, I agree with you. The cost of replacing or upgrading the existing system in many countries could be one of the biggest hurdle to overcome. Instead of upgrading the existing, it would be better to lay a new network, correct? This might take some more time in some countries. By the way, can we achive more than 10Mb/s on CAT3?
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