VDSL2 vectoring explained

Several system vendors including Adtran, Alcatel-Lucent and ZTE have announced vectoring technology that boosts the performance of very-high-bit-rate digital subscriber line (VDSL2) broadband access technology. Vectoring is used to counter crosstalk - signal leakage between the telephony twisted wire pairs that curtails VDSL2's bit rate performance – as is now explained.

Technology briefing

There is a large uncertainty in the resulting VDSL2 bit rate for a given loop length. With vectoring this uncertainty is almost removed

Paul Spruyt, Alcatel-Lucent

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ECOC 2012 summary - Part 2: Finisar

Gazettabyte completes its summary of key optical announcements at the recent ECOC show held in Amsterdam. In Part 2, Finisar's announcements are detailed.

Part 2

"The general thought with system vendors is that the more they can shrink the in-line equipment into a fewer number of slots, the more slots they have open and available for revenue-generating transceiver and transponder cards"

Rafik Ward, Finisar

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ECOC 2012 summary - Part 1: Oclaro

Gazettabyte completes its summary of key optical announcements at the recent ECOC show held in Amsterdam. Oclaro's announcements detailed here are followed by those of Finisar and NeoPhotonics.

Part 1: Oclaro

 

"Networks are getting more complex and you need automation so that they are more foolproof and more efficient operationally"

Per Hansen, Oclaro

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Q&A with Kotura's CTO: Integration styles and I/O limits

The second, and final part, of the Q&A with Mehdi Asghari, CTO of silicon photonics start-up, Kotura. 

Part 2 of 2

"When do the big players adopt a new technology and go from an electrical to an optical solution? In my experience, usually when they absolutely have to."

Mehdi Asghari, CTO, Kotura

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Silicon photonics: Q&A with Kotura's CTO

A Q&A with Mehdi Asghari, CTO of silicon photonics start-up, Kotura.  In part one, Asghari talks about a recent IEEE conference that included silicon photonics, the next Ethernet standard, and the merits of silicon photonics for system design.

Part 1

 

"Photons and electrons are like cats and dogs. Electrons are dogs: they behave, they stick by you, they are loyal, they do exactly as you tell them, whereas cats are their own animals and they do what they like. And that is what photons are like."

Mehdi Asghari, CTO of Kotura

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Does Cisco Systems' CPAK module threaten the CFP2?

Cisco Systems has been detailing over recent months its upcoming proprietary optical module dubbed CPAK. The development promises to reduce the market opportunity for the CFP2 multi-source agreement (MSA) and has caused some disquiet in the industry.

Source: Cisco Systems, Gazettabyte, see comments

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The CFP2 pluggable module gains industry momentum

Finisar and Oclaro unveiled their first CFP2 optical transceiver products at the recent ECOC exhibition in Amsterdam. JDSU also announced that its ONT-100G test equipment now supports the latest 100Gbps module form factor.

Source: Oclaro

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