Views on Next-generation 1.6T/3.2T Optical Modules for Data Centers

We will talk about the development trend of next-generation 1.6T/3.2T optical modules in data centers in the following passage.

The 800G optical module solution for the data center is clear, and most first-line optical module suppliers already had prototypes or small batches of 800G optical module. Next, we need to consider the next-generation optical module solutions.

Figure1: Development Trend of Data Center Optical Modules

Table1: Switch scale

For high-speed optical modules, there are two paths to increase the total conversion rate, one is to increase the number of channels, and the other is to increase the conversion rate of each channel. They are commonly known as channel generation and rate generation.

Two ways to increase the speed of optical modules

To increase the number of channels, there is no need to increase the bandwidth or modulation complexity, so it is technically easy to implement. However, in terms of the whole process, we have to consider how to accommodate more optical devices, how to perform multi-channel optical channel interfaces in limited space, and take into account electrical channel connections, density and power consumption.

To increase the single-channel rate, we need to use optical and electrical devices with larger bandwidths on the basis of the original number of channels or use more complex modulation formats.

More specifically, it is difficult to increase the number of channels, with insufficient space and high-density packaging. Some manufacturers have demonstrated 1.6T optical modules based on OSFP-XD.

New optical module package supports more parallel channels

To increase the rate of a single channel and to improve the analog bandwidth of optoelectronic devices requires stronger DSP signal processing capabilities, stronger FEC, and higher optical integration.

Promotion Path to Higher Rates

Figure2: Optical High Speed for Data Centers

FiberMall believes that the technical route for 1.6T optical modules is basically clear, and the industry chain is currently growing. It will have industrialization capabilities in 2024. On the basis of 800G optical modules, there are three technical solutions that can be realized.

Alternative Implementation Ways of 1.6T Optical Transceiver

However, the technical route of 3.2T is still unclear, and a process of technical optimization is in need.

Alternative Implementation Ways of 3.2T Optical Transceiver

1.6T/3.2T Optical Module Trend