Question 1

What are the advantages of using 1.6T optical transceivers in data centers?

Accepted Answer

In data centers, the 1.6T XDR single-mode optical module connects devices via two single-mode patch cables, achieving 2×800G double bandwidth. This significantly improves network throughput and GPU cluster interconnect efficiency while reducing the number of ports and cabling, lowering overall power consumption and operational costs. Additionally, it supports backward compatibility and future scalability, providing large-scale AI/HPC clusters with higher performance, greater energy efficiency, and a forward-looking network foundation.

Question 2

What are the advantages of the 1.6T optical transceivers compared to 400G/800G optical transceivers?

Accepted Answer

Compared to 400G and 800G optical transceivers, 1.6T optical modules provide higher bandwidth density, lower power consumption, and require fewer cables and ports. At the same time, they maintain backward compatibility and future scalability, significantly reducing the construction and operational costs of large-scale AI and HPC data centers.

Question 3

Which fibers can be used with 1.6T optical transceivers?

Accepted Answer

Currently, 1.6T single-mode optical transceivers are primarily used with OS2 single-mode patch cords, supporting transmission distances of up to 2 km. They are compatible with existing 400G and 800G single-mode cabling solutions, enabling seamless upgrades without replacing fiber patch cords.

Question 4

What is the typical coverage range of 1.6T optical-electrical interconnect products?

Accepted Answer

The coverage range of 1.6T optical-electrical interconnect products depends on application scenarios. For intra-cabinet or inter-cabinet connections, DAC or ACC cables are commonly used and are ideal for short-distance direct connections. For inter-floor or inter-data-center connections, single-mode optical transceivers can be used, supporting transmission distances of 500 meters or up to 2 km. By combining copper cables and optical transceivers, 1.6T interconnection solutions can meet diverse distance requirements while ensuring excellent bandwidth, latency, and reliability.

Question 5

What are the primary application scenarios for 1.6T optical transceivers?

Accepted Answer

1.6T optical transceivers are widely used in AI and machine learning, cloud services, and large-scale data centers. NADDOD 1.6T optical transceivers offer ultra-high data rates, ultra-low error rates, excellent thermal performance, and full compatibility with NVIDIA devices.

Question 6

What are the common packaging forms for 1.6T optical transceivers?

Accepted Answer

1.6T optical transceivers primarily use the OSFP form factor. OSFP provides ample thermal dissipation space and higher power handling capacity, making it suitable for high-density AI and HPC data centers. These modules typically feature a dual-port design, with each port supporting 800G, effectively integrating two 800G optical transceivers into a single 1.6T module.

Question 7

What modulation schemes are used in the 1.6T optical module?

Accepted Answer

The 1.6T optical module uses 200G PAM4 modulation. Each 800G port consists of four 200G PAM4 SerDes lanes.

Question 8

What are the mainstream technological approaches for optical components in 1.6T transceivers?

Accepted Answer

Mainstream optical component technologies for 1.6T transceivers include Silicon Photonics, which is suitable for large-scale integration and cost-effective manufacturing but limited by laser efficiency; EML (Electro-Absorption Modulated Laser), which is mature, reliable, and suitable for short to medium distances; and Thin-Film Lithium Niobate (TFLN), which offers high speed and low loss and is gradually entering commercial use.

Question 9

What are the advantages of 1.6T optical transceivers compared to copper cables (DAC/ACC)?

Accepted Answer

Optical fibers feature low transmission loss and support high-speed data transmission over distances exceeding 500 meters or more. As data rates increase, copper cables suffer from higher transmission loss and limited reach. In addition, the thicker diameter of copper cables occupies more cabinet and duct space and increases cabling complexity in large-scale deployments.

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