DCI

  • Why 100G QSFP28 ER4 Lite DML Is Suitable for DCI Network?

    The form factor of 100G optical transceivers constantly upgrade toward smaller size, the requirement for power consumption is lower, while the lower cost is a relentless pursuit of the industry. In general, there are form factors such as CFP/CFP2/CFP4 and QSFP28 for 100G optical transceivers. Among them, the QSFP28 is the dominant 100G form factor. This post will introduce the 100G QSFP28 ER4 Lite for DCI to us. The Evolution of the 100G Form Factor 100G QSFP28 ER4 Lite is compliant to QSFP MSA, IEEE 802.3ba 100GBASE-ER4 Lite and OTU4. IEEE 802.3ba defines that the 100GBASE-ER4 series have a BER requirement of better than 1E-12 w/o FEC for optical modules. Since the receiver sensitivity of 100GBASE-ER is not satisfied with the existing APD technology, the SOA size is too large for the QSFP28 series. Some providers in the industry of optical transceiver defined a non-standard 100GBASE-ER4 Lite with QSFP28 package that the largest transmission distance is up to 30km without FEC. The receiver sensitivity of 100GBASE-ER4 Lite 30km has no clear definition in IEEE802.3ba. The average of OMA sensitivity is around…

    July 6, 2019 0 0 11
  • Trends in 400G Optics for the Data Center

    Data Center Connections are Driving Optics Volume Due to the ongoing large increase in bandwidth demand, data center connections are expected to move from 25G/100G to 100G/400G. Within the Data Center Racks: 10GE is still being deployed, 25GE is starting to be deployed in volume, and 100GE or 50GE will follow. Between Data Center Racks: 40GE is still being deployed, 100GE is starting to be deployed in volume, and 400GE will follow at large cloud service providers. Long Spans, DCI and WAN: 10G DWDM/tunable is still being deployed, 100G/200G coherent starting to be deployed, and 400G coherent will follow—then 600G or 800G. Forecasted Data Center Ethernet Port Shipments Forecasted 400GE Shipments by Market Segment Mainstream 1RU Ethernet Switch Roadmap 3.2Tb/s switches based on 100G QSFP28 modules are being deployed in cloud data centers today. Given the multiple switching ICs expected to be available, the market is likely to be fragmented in the future. Large growth in bandwidth demand is pushing the industry to work on technologies and standards to support future 12.8T switches. 400G and Next-Gen 100G Ethernet Optical Standardization…

    May 13, 2019 0 0 1
  • Gigalight 100G 40km Optical Transceivers

    The solution includes two hot-pluggable optical transceivers. The 100G CFP2 ER4 module is used for metro long-haul optical transport network, while the 100G QSFP28 4WDM-40 module is used for long-haul data center interconnection.

    Videos April 12, 2019 0 0 13

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