There is no denying that the 100G data center optics market is accelerating, which leads to the great demand for 100G optical transceivers. Among all the 100G optical transceiver modules, the QSFP28 LR4 optical transceiver is the most preferred type. It is small in size, has low power consumption, high density, and high speed. This paper will provide you quick guide to understanding QSFP optical transceivers.

1. Email: ics@suntelecom.cn Skype: suntelecom.s01 Whatsapp: +86 21 6013 8637
There is no denying that the 100G data center optics market is accelerating, which leads to the great
demand for 100G optical transceivers. Among all the 100G optical transceiver modules, the QSFP28 LR4
optical transceiver is the most preferred type. It is small in size, has low power consumption, high density,
and high speed. This paper will provide you quick guide to understanding QSFP optical transceivers.
What is a QSFP28 LR4 Optical Transceiver?
QSFP28 LR4 is a hot-pluggable, 4-channel, and full-duplex optical transceiver designed for optical
communication applications. It is compliant with 100GBASE-LR4 of the IEEEP802.3ba standard.

2. Email: ics@suntelecom.cn Skype: suntelecom.s01 Whatsapp: +86 21 6013 8637
How Does QSFP28 LR4 Optical Transceiver Work?
QSFP28 LR4 optical transceiver converts 4 input channels of 25Gbps electrical data to 4 channels
of LAN-WDM optical signals and then multiplexes them into a single channel for 100Gbps optical
transmission. At the receiver side, the module de-multiplexers a 100Gbps optical input into 4
channels of LAN-WDM optical signals and then converts them to 4 output channels of electrical
data.
The central wavelengths of the 4 LAN-WDM channels are 1295.56,1300.05, 1304.58, and
1309.14nm as members of the LAN-WDM wavelength grid defined in IEEE802.3ba.The
high-performance cooled LAN-WDM EA-DFB transmitters and high sensitivity PIN receivers
provide superior performance for 100Gigabit Ethernet applications up to 10km links and are
compliant with optical interface with IEEE802.3ba Clause88 100GBASE-LR4 requirements.
Features and Benefits
QSFP28 LR4 optical transceiver provides the following features and benefits:
 Hot pluggable QSFP28 MSA form factor
 Compliant with IEEE 802.3ba 100GBASE-LR4
 Up to 10km reach for G.652 SMF
 Operating case temperature: 0~70C
 Transmitter: cooled 4x25Gb/s LAN WDM TOSA (1295.56, 1300.05, 1304.58, 1309.14nm)

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 Receiver: 4x25Gb/s PIN ROSA
 4x28G Electrical Serial Interface (CEI-28G-VSR)
 Single 3.3V power supply
 Maximum power consumption 4.0W
 Duplex LC receptacle
 RoHS-6 compliant
Applications
QSFP28 LR4 optical transceiver is used in 100GBASE-LR4 ethernet links, Infiniband QDR and DDR
interconnect, client-side 100G telecom connections, data centers, high-performance computing
networks, enterprise core and distribution layers, campus networks, etc.
Conclusion

4. Email: ics@suntelecom.cn Skype: suntelecom.s01 Whatsapp: +86 21 6013 8637
QSFP28 LR4 optical transceiver is used with single-mode fiber optic cables and duplex LC
connectors and can reach a maximum transmission distance of 10km. It has low power
consumption, small in size, and is easy to install and deploy. Sun Telecom specializes in providing
one-stop total fiber optic solutions for all fiber optic application industries worldwide. Contact us
if any needs.