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Entries in Maxim Kuschnerov (2)

Monday
Dec172018

Books in 2018 - Part 2

Some more books consumed in 2018, as recommended by Maxim Kuschnerov and Andrew Schmitt.

Maxim Kuschnerov, senior R&D manager at Huawei.

It is hard to believe the book Fire and Fury: Inside the Trump White House by Michael Wolff was published in 2018. Judging by what has happened since Trump’s inauguration, this recollection of his first days in the White House seems outdated. But it was fun to read while the memory of the election was still fresh. It is hard to judge whether all the book’s sources are truthful but the main message is certainly not too far off.

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Tuesday
Jun052018

400ZR will signal coherent’s entry into the datacom world  

  • 400ZR will have a reach of 80km and a target power consumption of 15W 
  • The coherent interface will be available as a pluggable module that will link data-centre switches across sites    
  • Huawei expects first modules to be available in the first half of 2020
  • At OFC, Huawei announced its own 250km 400-gigabit single-wavelength coherent solution that is already being shipped to customers

Coherent optics will finally cross over into datacom with the advent of the 400ZR interface.  So claims Maxim Kuschnerov, senior R&D manager at Huawei.

Maxim Kuschnerov400ZR is an interoperable 400-gigabit single-wavelength coherent interface being developed by the Optical Internetworking Forum (OIF) {add link}.

The 400ZR will be available as a pluggable module and as on-board optics using the COBO specification {add link}. The IEEE is also considering a proposal to adopt the 400ZR specification, initially for the data-centre interconnect market. “Once coherent moves from the OIF to the IEEE, its impact in the marketplace will be multiplied,” says Kuschnerov. 

But developing a 400ZR pluggable represents a significant challenge for the industry. “Such interoperable coherent 16-QAM modules won’t happen easily,” says Kuschnerov. “Just look at the efforts of the industry to have PAM-4 interoperability, it is a tremendous step up from on-off keying.” 

Despite the challenges, 400ZR products are expected by the first half of 2020.

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