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Views: 399 Author: Addams Publish Time: 2025-01-16 Origin: Site
The wave of AI has swept the world, bringing exponentially growing data computing needs. Traditional network data centers are facing unprecedented pressure. Traffic bandwidth restricts the development of artificial intelligence. High-bandwidth 400G and 800G optical modules have become the new darlings of data centers, but the bandwidth demand of AI computing networks is unlimited. 800G optical modules still cannot meet people's bandwidth demand for higher-speed computing networks. In this context, 1.6T optical modules, as the core of the next-generation communication technology, have become the focus of industry attention.
1.6T optical modules can achieve a transmission rate of 1.6 Tbps (1.6 trillion bits per second) on a single optical module. This rate is 2 to 4 times higher than the current mainstream 400G or 800G technology, which can better meet the high bandwidth requirements of data centers. The current industry's 1.6T optical module uses silicon photonics technology and multi-channel parallel to achieve a 1.6T transmission rate.
In the manufacturing of ordinary optical modules, modulators, receivers, passive optical devices and other devices are mainly integrated on PCB boards through packaging technology, with low integration, cumbersome processes and expensive labor costs. Silicon photonics technology uses CMOS manufacturing processes to integrate silicon optical module chips. Silicon optical module chips use silicon wafer technology to prepare key devices such as modulators and receivers on silicon substrates using etching processes and epitaxial growth processes to achieve high integration of modulators, receivers and passive optical devices. It has high integration, low cost, low power consumption, and stronger stability and performance. Only in this way can a 1.6T transmission rate be achieved in a limited volume.
The module complies with strict OSFP-XD MSA and CMIS protocol standards. The electrical interface uses 16 channels, and the single-channel signal rate is 100Gb/s; the optical interface uses 8 channels, and the single-channel signal rate is 200Gb/s. Both use PAM4 data modulation technology, which can transmit higher rates under the same baud rate conditions.
The cost of high rate is that power consumption cannot be further reduced. The 1.6T optical module industry adopts OSFP and QSFP-DD packaging specifications, and is equipped with heat dissipation fins, which can bring maximum heat dissipation in a limited space and ensure the stable operation of the module.
The rate of 1.6T is too high, and few devices are supported and the price is very expensive. It is currently mainly used in high-performance computing data centers (HPC), AI model training data centers and various communication experimental institutions. It is still necessary to solve the two difficulties of production and price before further promotion and use. However, I believe that with the advancement of technology, the future communication industry must belong to 1.6T optical modules.
The research and development and application of 1.6T optical modules mark a new height in the field of optical communications. It will greatly improve the computing performance of data centers, reduce the cost of data center construction, and promote mutual development with AI technology. Together, they will become the cornerstone of future ultra-high-speed networks and provide strong support for the continued development of AI and digital communications.
