Why Are 800G Optical Modules Important To AI?

 In today's fast-paced world, the need for high-speed data transmission has reached unprecedented levels. The emergence of AI applications and large models has made computing power a key infrastructure in the AI ​​industry. As the demand for faster communications continues to increase, high-speed optical modules have become an important component of artificial intelligence servers. This article takes an in-depth look at the evolution of 800G optical modules and their huge potential in the era of artificial intelligence.

 

01 The Evolution Of 800G Optical Modules

The optical module is responsible for the task of converting photoelectric signals in network connections. It is responsible for converting electrical signals into optical signals at the sending end, and then converting the optical signals into electrical signals at the receiving end after transmission through optical fibers.

 

With the development and integration of optoelectronic devices, their performance and transmission bandwidth continue to improve, and optical modules require higher transmission rates and smaller sizes to adapt to different usage scenarios. Packaging methods are also constantly evolving. Smaller packaging and power consumption mean that optical modules have higher port density on switches, and the same power can drive more optical modules.

 

Increasing bandwidth requirements

 

The growth in bandwidth requirements has had a significant impact on high-speed optical modules. With the continuous emergence of emerging technologies and the demand for large-scale data transmission, traditional 100G, 200G, and 400G optical modules can no longer fully meet market demand. In order to meet the growing bandwidth demand, 800G optical modules are becoming a trend.

 

Growth of LPO Technology

 

In the era of 800G optical modules, linear-drive pluggable optics (LPO) technology stands out. LPO utilizes linear analog components in the data link, eliminating the need for complex CDR or DSP design. Compared with DSP solutions, LPO significantly reduces power consumption and latency, making it ideal for the short-distance, high-bandwidth, low-power consumption and low-latency data connection requirements of AI computing centers. As cloud service providers expand their computing resources, LPO solutions including 800G LPO are expected to capture significant market share.

02 800G Optical Module Packaging

With the continuous advancement of technology, the packaging form of optical modules has undergone significant evolution. From early GBIC packaging, to smaller SFP packaging, to today's 800G QSFP-DD and OSFP packaging. This development trend not only reflects the continuous improvement in the speed of optical modules, but also shows its progress towards miniaturization and hot-swappability. The application scenarios of 800G optical modules are becoming more and more extensive, covering multiple fields such as Ethernet, CWDM/DWDM, connectors, fiber channel, and wired/wireless access.

 

800G MPO

 

800G QSFP-DD form factor:

 

Double-density four-channel small form factor pluggable high-speed module. QSFP-DD is currently the preferred package for 800G optical modules, enabling data centers to efficiently grow and expand cloud capacity as needed. The QSFP-DD module uses an 8-channel electrical interface with a rate of up to 25Gb/s (NRZ modulation) or 50Gb/s (PAM4 modulation) per channel, providing aggregation solutions up to 200Gb/s or 400Gb/s.

 

Advantages of 800G QSFP-DD:

 

1. It has downward compatibility and is compatible with QSFP+/QSFP28/QSFP56 QSFP packaging.

 

2. Adopts 2×1 stacked integrated cage connector, which can support single-height and double-height cage connector systems.

 

3. A minimum of 12 watts of thermal capacity per module is achieved via SMT connectors and 1xN cage. Higher thermal capacity can reduce the heat dissipation function requirements of the optical module, thereby reducing some unnecessary costs.

 

4. In the design of QSFP-DD, the MSA working group fully considered the flexibility of user use and adopted ASIC design, which supports multiple interface rates and is backward compatible (compatible with QSFP+/QSFP28), thereby reducing port costs and Equipment deployment costs.

 

800G OSFP form factor:

 

OSFP is a new type of optical module, much smaller than CFP8, but slightly larger than QSFP-DD. It has 8 high-speed electrical channels. Each 1U front panel still supports 32 OSFP ports. With integrated heat sink, it can greatly improve heat dissipation. performance.

 

Advantages of 800G OSFP:

 

1. The OSFP module is designed with 8 channels, directly supporting a total throughput of up to 800G, thereby achieving higher bandwidth density.

 

2. Because OSFP packaging supports more channels and higher data transmission rates, it can provide higher performance and longer transmission distances.

 

3. OSFP modules have excellent heat dissipation design and can handle higher power consumption.

 

4.OSFP is designed to support higher rates in the future. Due to the larger size of the OSFP module, it is possible to support higher power consumption and thus higher rates, such as 1.6T or higher.

 

Comparison of appearance parameters of 800G optical modules:

info-1080-448

 

QSFP-DD is usually preferred in telecom applications, and OSFP is more suitable for data center environments. The main differences between the two are:

 

1) Size: OSFP size is slightly larger

2) Power consumption: The power consumption of OSFP is slightly higher than QSFP-DD.

3) Compatibility: QSFP-DD is perfectly compatible with QSFP28 and QSFP+, while OSFP is not compatible.

 

Welcome consult us about the 800G optic module cost&price and delivery time!!

 

Link Card-Taylor

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