QSFP28 optical transceivers - Smartoptics

What is QSFP28?

QSFP28 (Quad Small Form-Factor Pluggable 28) is a compact transceiver form factor designed for high-capacity 100G Ethernet. By providing four lanes of 25G, QSFP28 enables a streamlined upgrade path from lower-speed networks, making it a popular choice for scaling data center interconnect (DCI) and service provider networks. The high port density and low power consumption of QSFP28 make it ideal for cost-efficient 100G deployments to meet growing bandwidth needs.

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Coherent 100G QSFP28 vs. PAM4 100G QSFP28

Coherent 100G QSFP28 brings the performance benefits and extended reach of 400ZR technology to 100G under the 100ZR standard, making it a popular choice in metro and regional networks. On the other hand, PAM4 QSFP28 optics offer a low-power, cost-effective solution optimized for shorter-range switch interoperability in data center environments.

Read more about why Coherent 100G QSFP28 is popular and how it differs from PAM 100G QSFP28. 

Smartoptics range of QSFP28 transceivers

Smartoptics offers a wide selection of QSFP28 transceivers designed to support 100G Ethernet across different networking environments.

• Coherent QSFP28 – Higher performance with wavelength tunability and extended reach up to hundreds of kilometers for metro, regional and long-haul networks.
• PAM4 QSFP28 – Cost-effective for high-density DCI and enterprise networks with lower power consumption ensuring wider switch compatibility.
• ZR4 QSFP28 – Supports distances up to 80 km, ideal for long-distance DCI and service provider networks without requiring amplifiers.
• SR4 QSFP28 – Enables 100G transmission over multimode fiber up to 100 meters, offering a compact solution for short-range intra-data center connectivity.

All Smartoptics QSFP28 transceivers provide seamless integration with major switch platforms, ensuring flexibility in both greenfield and brownfield network deployments.

Selected Smartoptics QSFP28 transceiver benefits

• Max performance and 100s of km reach with coherent QSFP28
• Cost-optimized PAM4 QSFP28 for enterprise DCI
• Breaks out to 4× 25G SFP28 connections for flexible scaling
• Interoperable with major switch and transport vendors
• For distances ranging from within a data center to metro, regional and long-haul
• Enhanced digital diagnostic information via I2C interface
• Rigorously tested for thermal, electrical and optical reliability
• Dedicated 24/7 in-house support
• Multi-source agreement (MSA) compliant

QSFP28 vs. QSFP+ – Key differences

Many organizations compare QSFP28 vs. QSFP+ when planning network upgrades. While both transceivers share a similar form factor, QSFP28 supports higher data rates and more advanced modulation technologies.

C-LIGHT's CL100GQSFPXZR4 is designed for commercial level 100km optical communication applications. This transceiver contains 4- lane optical transmitter, 4-lane optical receiver and transceiver management block including 2 wire serial I/O. The optical signals are multiplexed to a single-mode fiber through an industry standard LC connector. A block diagram is shown in following figure.

C-LIGHT's 100G QSFP28 XZR4 100KM optical transceiver product advantages

●Can effectively utilize existing optical fibers

Compared with 10G 40G optical transceiver products, the product's optical fiber interface, wavelength, and transmission distance have no major changes or shortcomings. This effectively avoids the reconstruction and new construction of existing optical fiber networks during upgrade implementation, thereby reducing optical fiber costs.

●Complete range of products

100G product series can meet the transmission requirements of dual-fiber or single-fiber bidirectional 100m, 500m, 2km, 10km, 20km, 40km, and 80km.

●Low energy consumption

Compared with 10G 40G optical transceivers, the energy consumption of 100G QSFP28 optical transceivers does not increase much, but the bandwidth is effectively improved.

●Excellent compatibility

The the 100G QSFP28 optical transceiver are designed to be compatible with a wide range of switch brands within existing networks, thereby minimizing switch waste.

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Application scene of C - LIGHT 100G QSFP28 XZR4 100KM optical transceiver

C-LIGHT adopts a self-made 100G QSFP28 XZR4 100km optical transceiver and adds an SOA amplifier at a distance of 80KM from point A, providing a total link budget of 47dB and achieving 100G P2P 140KM datacom from point A to point B.

In this solution, the 100G QSFP28 100km XZR4 transceiver of C-LIGHT can provide a transmit optical power of over +4dBm per channel and ensure a sensitivity of -29dBm per channel. The link budget for each channel is greater than 33dB. Combined with a 15dB gain SOA, this solution can provide a total link budget of over 48dB per channel.

The C-LIGHT 100G QSFP28 XZR4 100KM optical transceiver has a diverse range of application scenes.

In data center interconnects, it plays a crucial role. As data centers are expanding and the need for high-speed, long-distance communication between them grows, this optical transceiver enables seamless transfer of large volumes of data. It can handle the massive data traffic generated by cloud computing services, virtualization, and big data analytics, ensuring that data can be efficiently shared and processed across different data center locations that are up to 100 kilometers apart.

For metro - area networks (MANs), the C-LIGHT 100G QSFP28 XZR4 100KM optical transceiver is an ideal choice. MANs require reliable and high-capacity links to connect various locations within a metropolitan area, such as corporate offices, data centers, and service provider facilities. This transceiver provides the necessary bandwidth to support multiple services like high-speed internet access, voice over IP (VoIP), and video streaming for end-users in the metro area.

In long-haul backbone networks, it is also highly applicable. These networks form the core infrastructure for national and international communication. The 100G QSFP28 XZR4 100KM optical transceiver can transmit data over long distances without significant signal degradation, allowing telecommunications carriers to build and expand their backbone networks to meet the ever - increasing demand for long - distance data transmission, whether for connecting different regions or countries.

Moreover, in high-performance computing clusters, where rapid data exchange between nodes is essential for efficient processing, this optical transceiver can be used to create high-speed, long-distance links between computing nodes, facilitating parallel processing and distributed computing tasks that require quick access to data stored remotely within the 100-kilometer range.

Why choose C-light 100G QSFP XZR4 100KM optical transceiver

When considering optical transceivers, the C-LIGHT 100G QSFP XZR4 100KM optical transceiver stands out as an excellent choice for several reasons.

First and foremost, C-light brings with it 15 years of industry - leading experience. This extensive tenure in the field has allowed them to refine their products, understand the nuances of optical communication, and develop solutions that are reliable and efficient. Their long - standing presence is a testament to their ability to adapt to technological changes and meet the evolving needs of customers.

As an original factory, C-light has complete control over the manufacturing process. This means that every aspect of the 100G QSFP XZR4 100KM optical transceiver, from design to production, is carefully overseen. Quality control is of the highest standard, ensuring that each transceiver that leaves the factory meets strict performance and reliability criteria. This direct - to - market approach also means that customers can have confidence in the authenticity and integrity of the product.

The delivery cycle of C-light's 100G QSFP XZR4 100KM optical transceiver is another significant advantage. In today's fast-paced technological landscape, timely delivery is crucial. C-light has streamlined its production and supply chain processes to ensure that customers receive their orders promptly. This short delivery cycle enables businesses to quickly integrate the optical transceivers into their systems, reducing downtime and getting their networks up and running or upgraded without unnecessary delays.

Finally, competitive prices make the C-LIGHT 100G QSFP XZR4 100KM optical transceiver a cost - effective solution. Despite its high-quality construction, advanced features, and reliable performance, C-light offers this optical transceiver at a price point that is attractive in the market. This allows companies to enjoy top - notch optical communication capabilities without breaking the bank, making it an ideal choice for both budget - conscious and performance - driven enterprises.

In terms of what the 100G QSFP XZR4 100KM optical transceiver can do, it is designed to support high-speed data transmission at 100G over long-distance fiber optic links of up to 100 kilometers. It is suitable for a wide range of applications, including but not limited to long-haul data center interconnects, metro - area networks, and high - capacity backbone networks. It enables seamless and efficient transfer of large volumes of data, ensuring that network performance remains optimal even over extended distances.

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