Inphi’s 100G DWDM Solution for Data Center Interconnects
ColorZ™ Enables 4Tb/s of Aggregate Bandwidth per fiber in a QSFP28 Form Factor while Dramatically Lowering Power and Cost
Data Center Connectivity
Inphi’s state-of-the-art ColorZ reference design is the industry’s first Silicon Photonics PAM4 platform solution for Data Center Interconnects (DCI) in a QSFP28 form factor. ColorZ allows multiple regional data centers to be connected and act like a single virtual one. ColorZ provides the missing link that enables end-to-end 100G Ethernet connectivity throughout the Cloud and helps in realizing Inphi’s vision of "The Cloud is the Network™"
The growth of social networking, cloud computing, e-commerce and big data is driving bandwidth demand between data centers. This is motivating cloud operators to deploy high-density, low latency and low power DWDM links to connect multiple data centers or content delivery networks within a regional access area. ColorZ enables to provide up to 3.6Tb/s of capacity from a standard 1RU faceplate, increasing the density by 7.5x as compared to 10G DWDM solutions using a SFP+ form factor. Bringing cloud content closer to the user will also enable new services and an enhanced user experience.
ColorZ enables a capacity of 4Tb/s per fiber providing the spectral efficiency required for DCIs. ColorZ increases the spectral efficiency 5x as compared to alternate equivalent solutions using traditional 10Gb/s DWDM pluggable optics.
Low Power Consumption
ColorZ enables the user to meet the power envelope of a QSFP28 form factor. In addition, and as compared to alternate module level solutions, ColorZ offers significant power savings resulting in at least a 5x reduction in power dissipation and electricity cost. When taking into account a complete system implementation the power benefits are even more significant.
Regional data center geographical distribution is often limited by latency requirements to ensure an optimal user experience for Cloud based services. This is the fastest growing segment in the Metro Ethernet space and an 80km link distance is typically sufficient to provide complete network connectivity. ColorZ was designed to allow multiple data centers located up to 80km of each other to be connected and act like a single virtual data center. Furthermore, the link budget also enables regional connectivity in either a mesh or hub configuration.
100GHz Super Channel
ColorZ combines PAM4 modulation into two wavelengths resulting in a 100G DWDM super channel spaced on a 100GHz ITU Grid. This enables to use standard passive network multiplexing equipment for the line side transmission.
Leveraging Inphi’s leadership in PAM DSP technology, Linear Drivers and TIAs, the ColorZ reference design was optimized to fit in a QSFP28 hot pluggable form factor. The hot-swappable device plugs into any QSFP28 100G Ethernet port of any standard switch or router and also offers enhanced monitoring and link diagnostic capabilities. Ultimately, ColorZ enables enterprise, service providers and cloud operators to provide scalable and easy-to-deploy 100G Ethernet services in their networks.
DWDM System Requirements
The primary consideration in amplified DWDM systems is Optical Signal to Noise Ratio (OSNR). Using a super channel PAM4 modulation format combined with Inphi’s advanced Forward Error Correction (FEC) technology, ColorZ enables to exceed the minimum OSNR requirements of such 80km links for which standard off-the-shelf amplification equipment can be used.