GIGALIGHT's 400G QSFP-DD 2XFR4 Optical Module Offers a New Option for 400G Data Centers

SHENZHEN, China - Sept. 21, 2023 - PRLog -- Pursuing the optimal 400G data center configuration has always been a hot topic and focus in the industry. GIGALIGHT recently announced the launch of a 400G QSFP-DD 2×FR4 data center optical module based on the 50G PAM4 DML technology platform, providing a new option for customers' data center architectures.

The key difference between the newly launched 400G QSFP-DD 2×FR4 and the previous 400G QSFP-DD FR4 lies in the fact that the 400G 2×FR4 optical port supports 8×50G PAM4, while the 400G FR4 optical port supports 4×100G PAM4. Additionally, the 400G QSFP-DD 2×FR4 has networking advantages. It uses Duplex Dual LC optical interfaces, supporting the fan-out of two 200G QSFP56 optical modules, enabling a direct transition from 200G data centers to 400G data centers.

The networking architecture is as follows:

DWDM to Spine:

• 400G CFP2/QSFP-DD DCO

Spine to Leaf:

• 400G QSFP-DD 2xFR4 (2x200G)

Leaf to TOR:

• 200G QSFP56 FR4

TOR to Server:

• Option 1: 50G SFP56 PCC/ACC
• Option 2: 200G QSFP56 to 4x50G SFP56
• Option 3: 2x100G QSFP56 AOC/PCC

Furthermore, the 400G QSFP-DD 2×FR4, utilizing the 50G PAM4 DML technology platform, also has advantages in terms of cost structure and power consumption. Its main optoelectronic characteristics are as follows.

• 8x50G PAM4 Modulation
• TDECQ per channel < 3.1dB
• Max Power Consumption < 9W
• Exceptional Sensitivity
• Reach up to 2km

Eye diagram and sensitivity indicators:

• TDECQ per channel is less than the protocol specification of 3.1dB.
• RxSens (OMA) sensitivity is better than -5.5dBm @ 2.4e-4 Pre-FEC 26.5625GBd PAM4.
• Maximum power consumption of the optical module is less than 9W.

With the maturity of DML technology, cost-effective 400G data center solutions are moving towards maturity and commercialization. Leveraging the fusion of existing 7nm DSP technology and DML technology enables more efficient and cost-effective processing, transmission, and reception of data. This helps reduce the unit bit power consumption, making data centers more energy-efficient and cost-effective. GIGALIGHT will continue to delve into research and development, providing customers with even better internal data center interconnection solutions.

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