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Current issue

ELEKTRO 12/2021 was released on December 1st 2021. Its digital version will be available immediately.

Topic: Measurement, testing, quality care

Market, trade, business
What to keep in mind when changing energy providers

SVĚTLO (Light) 6/2021 was released 11.29.2021. Its digital version will be available immediately.

Fairs and exhibitions
Designblok, Prague International Design Festival 2021
Journal Světlo Competition about the best exhibit in branch of light and lighting at FOR ARCH and FOR INTERIOR fair

Professional literature
The new date format for luminaires description

Lasers capable of transmitting signals at 224 gigabits per second

7. 6. 2021 | Phys.org | www.phys.org

With the massive proliferation of data-heavy services, including high-resolution video streaming and conferencing, cloud services infrastructure growth in 2021 is expected to reach a 27% CAGR. Consequently, while 400 gigabit ethernet (GbE) is currently enjoying widespread deployment, 800 GbE is poised to rapidly follow to address these bandwidth demands.

One approach to 800 GbE is to install eight 100 gigabit per second (Gbps) optical interfaces or lanes. As an alternative to reduce the hardware count, increase reliability, and lower cost, a team of researchers at Lumentum developed an optical solution that uses four 200 Gbps wavelength lanes to reach 800 GbE.

Fast ethernet

To achieve high speed, high bandwidth operations, the team developed a lumped-element (LE) electroabsorption modulator-integrated distributed feedback (EA-DFB) laser capable of 2-kilometer transmission—a transmission length requirement for many modern large data centers—of 224 Gbps signals operating over a wide temperature range. Compared to a conventional EA-DFB, the LE EA-DFB's reduced capacitance and inductance resulting from design and assembly optimizations in the EA modulator improves its power and bandwidth.

Read more at Phys.org

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