• 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
  • High-Speed 100G QSFP28 CWDM4 Optical Transceivers

    Since 2017, the 100G QSFP28 CWDM4 optical transceiver has been the most popular product in the DCI (Data Center Interconnection). This article mainly portrays what the 100G QSFP28 CWDM4 optical transceiver is and why it is so popular. What Is the 100G QSFP28 CWDM4 Optical Transceiver? This Multi-Source Agreement (MSA) defines 4x 25Gbps Coarse Wavelength Division Multiplex (CWDM) optical interfaces for 100Gbit/s optical transceivers for Ethernet applications including 100GbE. Two transceivers communicate over single mode fibers (SMF) of length from 2 meters to at least 2 kilometers, available in SR and LR versions. Why Are the 100G QSFP28 CWDM4 Optical Transceivers So Popular? Longer Transmission Distance The transmission distance of the 100G QSFP28 CWDM4 Optical Transceiver can reach 2km. Although the 100G QSFP28 LR4 optical transceiver can reach 10km, the cost of the 100G QSFP28 CWDM4 Optical Transceiver is much lower, and it can meet a variety of medium and long-distance transmission requirements in the data center. Therefore, 100G CWDM4 MSA Technical Specifications published by MSA is a good complement to the gap due to the high cost of 100G…

    December 28, 2018 0 0 3

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