High-Performance 100G QSFP28 Optical Transceiver | 100G-LR4, SR4, CWDM4 Modules for Data Centers

The 100G QSFP28 module is a high-speed optical transceiver designed for next-generation 100 Gigabit Ethernet networks. It supports multiple transmission formats including QSFP28 100G-LR4, QSFP28 100G-SR4, and QSFP28 100G-CWDM4, providing flexible connectivity for data centers, cloud computing, and enterprise core networks.
With superior performance, energy efficiency, and broad compatibility, the module ensures stable, high-bandwidth data transmission for today’s high-density networking environments.

1. Structure & Design

• Form Factor: QSFP28 (Quad Small Form-factor Pluggable 28), compliant with IEEE 802.3ba and 802.3bm standards

• Transmission Distance:

  • QSFP28 100G-SR4: Up to 100 m via OM4 multimode fiber

  • QSFP28 100G-CWDM4: Up to 2 km via single-mode fiber

  • QSFP28 100G-LR4: Up to 10 km via single-mode fiber

• Connector Type: MPO/MTP (SR4), LC Duplex (CWDM4 & LR4)

• Wavelength: 850 nm (SR4), 1271/1291/1311/1331 nm (CWDM4 & LR4)

• Data Rate: 4×25 Gbps (aggregate 100 Gbps)

• Power Consumption: <3.5W typical, low-power design

• Digital Diagnostic Monitoring (DDM): Real-time monitoring for temperature, power, and voltage

• Hot-pluggable design for quick installation and easy maintenance

2. Applications

• High-speed data center interconnections

• Cloud computing and virtualized networks

• Enterprise backbone and aggregation layers

• 100G Ethernet switches, routers, and servers

• Metro and telecom networks supporting 100G optical transmission

3. Advantages

• Stable 100Gbps optical transmission across short and long distances

• Multiple reach options: SR4, CWDM4, LR4 for different applications

• Broad compatibility with major network device brands

• Plug-and-play installation for rapid network upgrades

• Energy-efficient design with low latency and high reliability

• Ideal for upgrading from 40G to 100G data center architectures

4. FAQs

Q1: What are the differences between 100G QSFP28-SR4, CWDM4, and LR4 modules?
A1:

• SR4: Short-reach module using multimode fiber (up to 100 m on OM4).

• CWDM4: Medium-reach single-mode module (up to 2 km).

• LR4: Long-reach single-mode module (up to 10 km).

Q2: Are QSFP28 modules backward compatible with QSFP+ ports?
A2: Physically compatible, but data rate negotiation is not supported. QSFP28 modules operate only at 100Gbps.

Q3: What kind of fiber cables are required?
A3:

• SR4: MPO/MTP multimode fiber (OM3/OM4)

• CWDM4 & LR4: LC duplex single-mode fiber

Q4: Do these modules support DDM/DOM functions?
A4: Yes, all models support Digital Diagnostic Monitoring, providing real-time feedback on optical power, temperature, and voltage.

Q5: What are the typical power consumption levels?
A5: Most QSFP28 modules consume less than 3.5W, providing high performance with low energy usage.