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What is the difference between 800G OSFP SR8 and 800G OSFP DWDM8?

May 08, 2026

Alex Tan
Alex Tan
Alex is a Firmware Engineer working on embedded systems for optical transceivers. His role involves developing efficient firmware solutions that enhance device performance and interoperability in data center environments.

Hey there! As a supplier of 800G OSFP SR8, I often get asked about the differences between 800G OSFP SR8 and 800G OSFP DWDM8. So, I thought I'd write this blog to break it down for you.

Let's start with the basics. First off, both 800G OSFP SR8 and 800G OSFP DWDM8 are part of the High Speed Optical Transceiver family, which is designed to meet the ever - increasing demand for high - speed data transmission.

800G OSFP SR8

The 800G OSFP SR8 is a short - reach optical transceiver. SR stands for short - reach, and it's mainly used for short - distance communication within a data center. It operates over multi - mode fiber (MMF). The 800G OSFP SR8 uses eight 100G parallel channels to achieve an aggregate data rate of 800Gbps.

One of the big advantages of the 800G OSFP SR8 is its cost - effectiveness for short - distance applications. Since it uses multi - mode fiber, which is generally less expensive than single - mode fiber, it's a great choice for in - rack or intra - data - center connections. Also, the installation and maintenance of multi - mode fiber are relatively easy, which can save a lot of time and money.

For example, if you have a data center where servers are located close to each other, like in a rack or within a building, the 800G OSFP SR8 can provide a high - speed and reliable connection without breaking the bank.

800G OSFP DWDM8

On the other hand, the 800G OSFP DWDM8 is designed for long - distance and high - capacity transmission. DWDM stands for Dense Wavelength Division Multiplexing. This technology allows multiple optical signals to be transmitted simultaneously over a single fiber by using different wavelengths of light.

The 800G OSFP DWDM8 uses eight different wavelengths to achieve the 800Gbps data rate. It operates over single - mode fiber (SMF), which has a much lower attenuation compared to multi - mode fiber. This means it can transmit data over much longer distances, sometimes up to hundreds of kilometers.

If you need to connect data centers that are far apart, or if you're building a wide - area network (WAN), the 800G OSFP DWDM8 is the way to go. It can handle high - volume data traffic over long distances, ensuring that your data is transmitted quickly and accurately.

Key Differences

1. Reach

The most obvious difference is the reach. As I mentioned before, the 800G OSFP SR8 is for short - distance applications, typically up to 300 meters over multi - mode fiber. In contrast, the 800G OSFP DWDM8 can reach much longer distances, often up to 80 kilometers or more over single - mode fiber.

2. Fiber Type

The 800G OSFP SR8 uses multi - mode fiber, which has a larger core diameter and is better suited for short - distance communication. The 800G OSFP DWDM8 uses single - mode fiber, which has a smaller core diameter and is designed for long - distance transmission.

3. Cost

The cost of the 800G OSFP SR8 is generally lower. The multi - mode fiber used in SR8 is cheaper, and the transceiver itself is also less expensive due to its simpler design. The 800G OSFP DWDM8, on the other hand, is more expensive because of the DWDM technology and the single - mode fiber required.

4. Application

The 800G OSFP SR8 is mainly used for intra - data - center connections, such as between servers, switches, and storage devices. The 800G OSFP DWDM8 is used for inter - data - center connections, WANs, and other long - distance communication scenarios.

800G Optical ModuleOSFP 800G

Why Choose Our 800G OSFP SR8?

As a supplier of 800G OSFP SR8, I can tell you that our products have several advantages. First of all, we offer high - quality 800G Optical Module that are fully compliant with industry standards. Our 800G OSFP SR8 transceivers are tested rigorously to ensure reliable performance.

We also provide excellent customer service. If you have any questions about our products, our technical support team is always ready to help. Whether it's installation advice or troubleshooting, we've got you covered.

In addition, our prices are very competitive. We understand that cost is an important factor for our customers, so we strive to offer the best value for money.

Conclusion

In conclusion, the 800G OSFP SR8 and 800G OSFP DWDM8 are two different types of optical transceivers with their own unique features and applications. The 800G OSFP SR8 is great for short - distance, cost - effective connections, while the 800G OSFP DWDM8 is ideal for long - distance, high - capacity transmission.

If you're in the market for an OSFP 800G solution, especially for short - distance applications, our 800G OSFP SR8 might be the perfect choice for you. We're here to help you make the right decision and provide you with the best products and services. If you're interested in learning more or making a purchase, don't hesitate to reach out to us for a procurement discussion.

References

  • Industry whitepapers on high - speed optical transceivers
  • Technical specifications of 800G OSFP SR8 and 800G OSFP DWDM8 products

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