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Tutorial/Five Types of 100G QSFP28 Transceivers

Five Types of 100G QSFP28 Transceivers

At present, the 100G QSFP28 optical module is the core product of the data center and 5G transmission. 100G QSFP28 industry chain is mature, the product`s cost-effectiveness will have a significant rise during 2020-2022. The total demand for 100G will reach $4.9 billion in 2022.

100G QSFP28 optical modules adopt four fiber-optic channels to transmit data, and the transmission rate of each fiber channel can reach up to 28Gbps.

The package size of 100G QSFP28 is relatively small, It is only a quarter of the width of 100G CFP optical module


100G QSFP28 SR4 Transceiver

100GBASE-SR4 QSFP28 optical module is a parallel optical module. It is composed of four independent transmit and receive channels. Each channel rate is 25.78Gbps, and the total data rate up to 103.1Gbps.

The optical interface of the 100GBASE-SR4 QSFP28 optical module is Male MTP / MPO-12. As two 100GBASE-SR4 QSFP28 are connected to each other, requiring Polarity Type B MTP / MPO-12.

Optical Interface

Polarity Type B MTP/MPO-12

100GBASE-PSM4 QSFP28 Transceiver

PSM4 refers to Parallel Single Mode 4. It is a single-mode four-channel parallel module. In fact, PSM4 is very similar to SR4, both are MPO 1x12 optical interfaces. One is based on multi-mode VCSEL and the other is based on single-mode DFB.

The Polish Type of 100G QSFP28 PSM4 is APC. Using SMF MTP / MPO Trunk Cable require Polish Type for APC to APC.

100GBASE-CWDM4 QSFP28 Transceiver

QSFP28 CWDM4 optical module through coarse wavelength division multiplexing (CWDM) technology to multiplex four wavelengths of 1271nm, 1291nm, 1311nm, and 1331nm onto a single-mode fiber for transmission.

The transmission rate of the QSFP28 CWDM4 optical module is 103.1Gbp, and the transmission distance of 2km has fully met the needs of large IDC computer rooms. Its cost is significantly lower than the QSFP28 LR4 optical module.

100G CWDM4 Diagram

From 2020 to 2021, 100G QSFP28 CWDM4 optical modules will be widely used in the next-generation IDC deployment of the OCP project team.

100GBASE-LR4 QSFP28 Transceiver

100GBASE-LR4 QSFP28 optical module is generally used with LC single-mode Fiber Optic Cables, and the maximum transmission distance is 10km. The 100GBASE-LR4 QSFP28 optical module translates four 25Gbps electrical signals into four LAN WDM optical signals with an interval of 4.56nm between adjacent channels. And then multiplexed it onto a single fiber for transmission, achieving 100G optical transmission. At the receiving end, the module demultiplexes 100G optical input into 4 LAN WDM optical signals.

100G QSFP28 ER4 Transceiver

100G QSFP28 ER4 optical module adopts WDM multiplexed wavelength division technology, with wavelength of 1295.56 ~ 1309.14, the package form is QSFP28. It uses LC duplex connectors, the maximum transmission distance can reach 40KM when use it with single-mode fiber, featuring with DDM, small size And low power consumption. It is applied to OTN equipment, supports the OTU4 rate, and can transmit 40km without turning on the forward error correction function, which can simplify the transmission network of the metropolitan area network, reduce the relay equipment, and decrease the system delay and the costs of operation and maintenance.

Applied to the DCI network of the data center, it provides a convenient choice for the long-distance interconnection application of 100G ports between data center rooms. The distance can reach 40KM when 100G ER4 optical module is connected to 100G switch.

The receiving device of the 100G ER4 optical module is APD, featuring high receiving sensitivity and low power consumption. It Provides a cost-effective solution for long-distance applications of 100GE ports between computer rooms.

100GQSFP28 ER4 receiving module

With the development of 5G technology and next-generation supercomputer technology, the communications requirements for bandwidth will be higher and higher, and Tbit technology is waiting for you to implement!