Fiji Low-Cost Low-Power Optical Module 400G

Broadcom's 400G/lane Taurus BCM83640 DSP enables low-power, high-density 400G optical modules for cost-effective AI and cloud data center interconnects.

Overview

The Fiji low-cost, low-power 400G optical modules leverage the latest 400G/lane PAM-4 DSP technology, such as Broadcom's Taurus BCM83640, to deliver high bandwidth density while minimizing power consumption and cost. These modules are designed for 1. 6T pluggable transceivers, effectively doubling the bandwidth per optical lane compared to previous 200G/lane architectures, and enabling 102.

4T switching capacity in a 1RU system. This makes them ideal for AI clusters, cloud networks, and high-performance data center interconnects. Key Features400G/lane PAM-4 interfaces: Each lane supports 400G serial optical signaling, allowing high-density 1.

6T and future 3. 2T modules. Low power consumption: Optimized for energy efficiency, enabling deployment in dense switch ASICs and pluggable modules without exceeding thermal limits.

Advanced DS

P and equalization: Compensates for optical impairments while maintaining low power, supporting high-speed PAM-4 links in QSFP-DD and OSFP form factors. Integrated voltage regulators and FEC: Provides robust error correction and simplifies module design, reducing overall system cost. Scalable roadmap: Supports future 3.

2T optical modules with 400G/lane electrical interfaces, enabling next-generation 204. 8T switches.

Deployment and Form Factors

Fiji 400G modules are compatible with QSFP-DD and OSFP pluggable form factors, allowing easy integration into existing 400G-capable switches and routers. They are suitable for short-reach pluggable interconnects in AI and cloud data centers, as well as metro and regional networks when combined with coherent optics solutions. The low-cost, low-power design ensures that these modules can scale to millions of units over the next five years, supporting widespread adoption.

Advantages

Cost efficiency: By doubling bandwidth per lane and reducing power, these modules lower the cost per bit for high-speed optical interconnects. Power efficiency: Enables dense deployment in 1RU switches without exceeding thermal budgets. High performance: Supports 400G PAM-4 links with advanced DSP equalization, FEC, and crossbar functionality for reliable high-speed transmission.

Future-proof: Provides a clear path to 3. 2T optical modules and higher-density switch architectures. Fiji low-cost, low-power 400G optical modules represent a critical step in scaling AI and cloud network bandwidth, combining high performance, energy efficiency, and cost-effectiveness to meet the growing demands of modern data centers.