100G Optical Module Selection Guide: Advantages and Types of QSFP28

Introduction to QSFP28 100G Optical Module

In today's rapidly developing network communication field, the QSFP28 100G optical module is vital. It is an optical module based on the QSFP28 (Quad Small Form-factor Pluggable 28) package, mainly used to achieve a high-speed photoelectric conversion function, which designed to meet the growing demand for high-bandwidth network communication.

This optical module follows strict industry standard specifications and allows high-speed transmission of data in optical fibers by converting electrical signals into optical signals and vice versa. In the data center, enterprise network, telecommunications and other network architecture, the QSFP28 100G optical module is one of the key components to achieve a 100Gbps data transmission rate. Its performance directly affects the communication quality and efficiency of the entire network.

Characteristics and Advantages of QSFP28 100G Optical Module

Unique Package Type

As a typical package type of 100G optical module, QSFP28 has distinctive characteristics, making it stand out among many optical module package types (such as SFP, SFP+, XFP, etc.).

From the physical structure, the QSFP28 package is relatively compact and can integrate multiple high-speed signal channels in a limited space, achieving a highly integrated design. This feature makes it particularly suitable for use in high-density networking devices, such as switches, routers and other devices in modern data centers, which often require a large number of high-speed data connections in a small space.

In terms of electrical performance, the QSFP28 package provides higher signal transmission rates and lower signal losses. Compared with other package types, it can better meet the requirements of 100Gbps and higher data transmission rates, and can maintain the integrity of the signal during long-distance transmission, effectively reducing the bit error rate.

Low Power Consumption and High Performance

Another notable feature of 100G QSFP28 optical transceivers is their relative minimal power consumption. This attribute enables them to consume less energy, thereby reducing operational expenditure in the long run, especially for data centers where such expenditure constitutes a significant portion of total operational costs. This characteristic is particularly crucial for data centers that aim to maintain a balance between cost-effectiveness and high-performance service delivery.

In addition to their compact size and low power consumption, 100G QSFP28 optical transceivers also exhibit superior performance and reliability. They are engineered to support a wide range of transmission speeds and distances, making them highly adaptable and flexible for use in a variety of applications. Furthermore, these transceivers are constructed using high-quality components and undergo rigorous testing to ensure that they meet stringent quality standards.

Reasons for Choosing QSFP28 100G Optical Module

Long-Distance Transmission Capability

One of the standout features of QSFP28 100G is their ability to effectively support transmission ranges of several dozen kilometers, and in some cases, even over a hundred kilometers. This capability makes them ideal for applications such as inter-data center connectivity, metropolitan area networks (MANs), and long-haul communications.

The long-distance transmission capacity reduces the reliance on intermediate equipment, thereby simplifying the overall network architecture and lowering costs.

High Bandwidth and Low Latency

As data volumes continue to grow exponentially due to trends like big data, cloud computing, and the Internet of Things (IoT), the demand for higher bandwidth becomes increasingly pressing. 100G optical modules provide extremely high data transfer rates, capable of meeting these requirements and ensuring rapid data processing and transmission.

Furthermore, the inherent properties of optical fiber transmission enable these modules to maintain low latency, which is crucial for real-time applications such as video conferencing, online gaming, and financial trading. The combination of high bandwidth and low latency makes 100G optical modules an ideal choice for high-performance networks.

Support for Multiple Protocols and Interfaces

Another significant advantage of 100G optical modules is their compatibility with various transmission protocols (such as Ethernet and Optical Transport Network [OTN]) and different types of interfaces (like LC、MTP/MPO). This flexibility allows for seamless integration with a wide range of network devices, including switches, routers, and fiber channel systems.

Network administrators can select the appropriate module based on specific requirements, enabling flexible network configurations and upgrades to adapt to ever-changing business needs.

Selection Points and Types for QSFP28 100G Optical Module

Consider the Transmission Distance and Wiring Structure

The SR4 optical module is a suitable choice for short-distance (usually 100-300 meters) data transmission, such as the connection between server cabinets in the data center or between adjacent cabinets. The SR optical module uses multi-mode optical fibers to support simultaneous transmission of multiple optical fibers, and the cost is relatively low, which can meet the requirements of short-distance high-speed data transmission in the data center.

For short and medium distance (2-5 km) high-speed data transmission scenarios, such as the connection between different areas within the enterprise network or the interconnection between different functional areas within the data center, the PSM4 type optical module is a good choice. The PSM type uses single-mode fiber parallel transmission technology to provide a stable transmission rate of 100Gbps over this distance range, and achieves a good balance between cost and performance.

When the transmission distance is longer (more than 10 kilometers), such as the connection between the metropolitan area network, long-distance backbone network or data center, you need to consider the LR4 or ER4 optical module. LR4 is suitable for long-distance transmission of more than 10 kilometers, and ER4 further expands the transmission distance, which can reach a transmission distance of about 40 kilometers. They all use single-mode optical fibers to ensure low signal attenuation and high stability for 100Gbps signals over long distances, accurately transmitting from source to destination.

In addition, you also need to consider the connection mode of the optical fiber, for example, whether the connector type of the optical fiber (LC, MPO, etc.) matches the interface of the optical module. The correct connection of the optical fiber connector can ensure the effective transmission of optical signals and avoid signal loss or failure caused by the mismatch of the connector.

The following diagram shows the specific differences between these types.

Combined with Hardware Equipment and Application Environment

In addition to the above factors, it is also necessary to use a combination of hardware equipment and a specific application environment to select the appropriate QSFP28 100G optical module.

In terms of hardware devices, consider the compatibility between optical modules and connected network devices, such as switches, routers, and server nics. Network devices from different vendors may have different compatibility requirements on optical modules. Therefore, you need to ensure that the selected optical module is correctly identified and supported by the target device.

At the same time, the application environment also affects the selection of optical modules. If it is used in an industrial environment, such as factory workshops, mines, power substations, etc., due to the presence of dust, electromagnetic interference, large temperature changes and other factors, it is necessary to select industrial optical modules with good industrial grade temperature adaptability (-40℃ to +85℃) and anti-interference ability to ensure stable operation in harsh environments.

To learn more about 100G industrial grade optical modules, please click: Achieve Reliable 100G Performance with FS QSFP28 ITEMP Transceivers in Extreme Temperatures

Conclusion

In summary, the QSFP28 100G optical module plays an important role in many network application scenarios with its unique package type, wide operating temperature range, excellent key parameters and rich type choices. When selecting the optical module, it is necessary to consider many factors such as transmission distance, cabling structure, hardware device compatibility, and application environment to ensure that the most suitable product is selected to meet the needs of different network construction and applications.

As a leading global provider of network infrastructure solutions, FS is committed to providing a range of high-quality QSFP28 100G transceivers​designed to optimize network performance and provide customers with more stable, efficient and secure data center services. Its superior design philosophy ensures product stability and signal integrity, making it ideal for a wide range of applications from data centers to 5G networks.