FEATURE: DATA CENTRE OPTICS
Live multi-vendor demonstrations featuring 400ZR
g metro access applications to support things like, for example, 5G mobile,’ he said. ‘So, the core of
the networks will be increasingly using coherent technology, and we are investing significantly in components for just such applications.’
Te missing link For example, 400ZR is being developed to link switches in separate data centres up to 80km apart as an Ethernet-based networking interface, defined by the Optical Internetworking Forum (OIF). It specifies 400Gb/s optical transmission over a single wavelength for dense wavelength division multiplexing (DWDM) deployments, providing massive interconnect bandwidth. It is enabled by advanced coherent optical
technology design targeting small, pluggable form factor modules such as QSFP-DD and OSFP, and proposes a technology-driven solution for high capacity data transport, matched to 400GE switch port market introduction. NeoPhotonics recently sampled its
400ZR ClearLight OSFP transceiver to a cloud customer. It uses a silicon photonics coherent optical sub-assembly and low power consumption, ultra-narrow linewidth Nano-ITLA tunable laser, combined with the latest generation of 7nm node digital signal processing technology, to provide full 400ZR
18 FiBRE SYSTEMS n Issue 26 n Winter 2020
transmission in a standard data centre OSFP form factor that can be plugged directly into switches and routers. Te transceiver can plug directly into the
front panel of a switch or router to provision 400G connections over metro distances in a manner virtually the same as connections inside one data centre. It is compliant with the OIF 400ZR Implementation Agreement and is interoperable with other manufacturers’ 400ZR modules that use a standard forward error correction (FEC) encoder and decoder. It can also be optionally provisioned to tune over the entire Super C-Band, or up to 6.4Tz.
Te simple life Tim Jenks, chairman and CEO of NeoPhotonics said: ‘We are now sampling these OSFP transceivers so that customers can evaluate the simplicity, cost and operating savings that can be realised by plugging coherent optics directly into switches and routers, and we are applying this same technology to additional form factors, such as QSFP-DD.’ Likewise, Inphi has begun sampling its
Colorz II 400ZR QSFP-DD pluggable coherent transceiver to cloud operators and OEMs. Dr Loi Nguyen, senior VP, optical interconnect at Inphi, explained that the transceiver enables large cloud operators to connect metro data centres in a more cost-efficient way, and allows
CUSTOMERS CAN EVALUATE THE SIMPLICITY, COST AND OPERATING SAVINGS THAT CAN BE REALISED BY PLUGGING COHERENT OPTICS DIRECTLY INTO SWITCHES AND ROUTERS
switch and router companies to offer the same density for both coherent DWDM and client optics in the same chassis. Tis eliminates a layer of network connectivity that was previously required and supports high capacity DWDM connectivity directly from data centre switches. It includes 400G single-chip, coherent silicon
photonics integrated circuit (PIC) that includes all transmit and receive functions, as well as low cost, passive alignment of fibre to the PIC that eliminates the complicated active alignment, using traditional optics. It also has an integrated industry standard firmware management interface that enables full performance monitoring. Te transceiver is also supported by a multi-vendor industry-wide ecosystem. Nguyen said: ‘By meeting the needs of cloud
network companies that require extended link reaches, the 400ZR opens up new possibilities for data centre interconnects to reduce total cost of ownership of cloud networks. As a fabless company, we are ready to meet our customers’ demand for Colorz II.’
www.fibre-systems.com @fibresystemsmag
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