Spring 2018 Optical Connections Magazine

“It will be challenging for current generation systems to achieve 400G/lambda over long haul and marine distances.”


JohnWilliamson – see page 16

Big data: Cleareon have purchased an additional 20,000 square feet of New York City metropolitan space

Cleareon expands further to support New York 5G

Cleareon is helping to ready New York for 5G and improved IoT connectivity with the acquisition of extra data centre network edge capacity. The new assets are bringing more than 20,000 square feet of extra metro edge data centre space to the company’s portfolio of access solutions. The New York- headquartered firm provides services around wholly- owned fibre infrastructure and optical interconnectivity. The new assets within the New York City metropolitan Researchers at the Harvard John A. Paulson School of Engineering and Applied Sciences (SEAS), together with collaborators from the Fu Foundation School of Engineering and Applied Science at Columbia University, have developed a system to convert one wavelength of light into another without the need to phase-match. The converter relies on a metasurface, consisting of an array of silicon

even data centre services. We’re oering premium access solutions while readying NYC for 5G, IoT and other promising wireless- enabled applications – right now.” Cleareon’s data centre expansion has also enabled the company to expand its cloud networking options to include a set of hybrid solutions across cloud, multi- cloud, co-location and bare metal, all provided via SSAE16/ SOC1&2/PCI/ HIPAA/HITECH compliant facilities across New York City. while being confined inside a waveguide,” explained Cheng Wang, co-first author of the paper and Postdoctoral Fellow at SEAS. “In this way, we take advantage of both the momentum control from the metasurface and a long interaction distance.” The researchers demonstrated that they could double the frequency of a wavelength, converting near infrared colours to red, with high eciency over a broad bandwidth.

area, from undisclosed sellers, come after Cleareon’s purchase of other network capacity in the city last year. DENSIFICATION “This latest deal positions Cleareon to take advantage of densification opportunities in the NYC area,” said the company, “and provides additional connectivity to numerous carriers and wireless service providers”. Supported by extra dense fibre infrastructure, roof rights and power plants, Cleareon says the acquisition oers nanostructures, integrated into a lithium niobate waveguide. The light passes through waveguide, interacting with the nanostructures along the way. The array of nanostructures act like a TV antenna – receiving the optical signal, manipulating its momentum and re-emitting it back into the waveguide. “For any wavelength conversion process to be ecient, it has to be carefully designed to phase-match,

wider interconnectivity and front-haul support for DAS, small cell and other wireless systems, such as 5G-enabled applications, the IoT and big data transport. Cli Kane, Co-CEO at Cleareon, said: “As with our 2017 acquisition, these assets complement Cleareon’s existing dark fibre and lit services portfolio by strengthening our position at the ‘intelligent edge’ of networking technology and service deployment. “We aren’t simply oering dark fibre or lit services or and it only works at a single wavelength,” said Mark Loncar, the Tiantsai Lin Professor of Electrical Engineering at SEAS and senior author of the paper. “The devices shown in this work, in contrast, do not need to satisfy the phase-matching requirement, and can convert light in a broad colour range.” “Unlike most metasurfaces, where light travels perpendicularly to the metasurface, here light interacts with the metasurface

Light colours changed without phase-matching


| ISSUE 12 | Q1 2018


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