As parameter counts in generative AI models expand exponentially, single-GPU configurations can no longer meet processing demands. While clustered computing has become industry standard, it introduces severe physical limits: the Bandwidth Wall and the Power Wall.

In modern AI server architectures—specifically within chip-to-chip (Die-to-Die) and board-to-board Scale-Up expansion topologies—traditional copper interconnects are rapidly hitting physical ceilings. Signal attenuation, elevated latency, and unsustainable power dissipation have sparked a clear consensus: transitioning from electrical to optical interconnects is mandatory.

To address this challenge, iReach Corp. has forged a deep strategic technical partnership with Brillink Inc. to jointly deliver ultra-efficient optical interconnect solutions tailored for next-generation AI infrastructures.

Core Engine: Wafer-Bonding Flip-Chip Micro VCSEL Arrays Powering Brillink's OE Engine
Brillink specializes in advanced Silicon Photonics and Co-Packaged Optics (CPO) architectures. To optimize transmission across varying distances, Brillink employs InP for Scale-Out, and leverages Micro LED and Micro VCSEL as light sources for short-to-medium-distance Scale-Up transmission. Micro LED offers key advantages such as ultra-low power consumption, while Micro VCSEL serves as an excellent option for light collimation and speed. At the core of Brillink’s innovation is its world-class Avalanche Photodiode (APD) sensor integrated into an advanced Optical-Electro Engine (OE Engine). This system extends the transmission distance of sub-1000 nm wavelengths while reducing energy consumption to under 1 pJ/bit, delivering superior cost-efficiency and scalability.

A stable, highly dense light source is essential to maximize OE Engine efficiency. For this partnership, iReach supplies its cutting-edge Wafer-Bonding Type Flip-Chip Micro VCSEL Array technology. Compared to legacy wire-bonded emitters, the Flip-Chip structure offers major technical advantages:

• Low Parasitic Inductance & Ultra-High Bandwidth: Shortened electrical interconnects minimize signal distortion under high-speed data modulation.
• High-Density 2D Array Driving Architecture: Dual-layer routing achieves multi-channel output and independent channel control within a compact die footprint.
• Streamlined Fiber Coupling Integration: Vertical backside emission and semiconductor-grade dimensional precision allow direct, seamless coupling with Fiber Array Units (FAUs), lowering assembly complexity and cost.

Redefining Next-Gen AI Infrastructure in Scale-Up Scenarios
By integrating iReach’s high-performance Wafer-Bonding Flip-Chip Micro VCSEL arrays into Brillink’s APD-based OE Engine, the joint solution achieves industry-leading optical efficiency, ultra-low latency, high bandwidth density, and lower total cost of ownership. This significantly reduces power dissipation during Scale-Up data transmission while establishing a solid foundation for volume production of CPO and high-density optical modules.

Accelerating into the Era of Optical Computing
Because Micro VCSELs deliver superior optical power density compared to LEDs, they are ideally suited for 10m+ Scale-Up interconnects, perfectly complementing Micro LED technologies. Combining iReach’s device-level Micro VCSEL mastery with Brillink’s expertise in Silicon Photonics IC design and advanced packaging will propel optical interconnects from concept into volume commercial deployment, driving the next wave of global AI computing power.

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