Avicena Will Showcase Its Multi-Tbps LED-Based Optical Link for Chip-to-Chip Communication at ECOC 2021

September 13, 2021

MOUNTAIN VIEW, Calif. & BORDEAUX, France, Sept. 13, 2021 — Avicena Tech Corp., a privately held company in Mountain View, CA, is demonstrating its LightBundle multi-Tbps LED-based chip-to-chip interconnect technology at the European Conference for Optical Communications (ECOC) 2021 in Bordeaux, France.

The Avicena LightBundle achieves order-of-magnitude improvements in power dissipation and density over any other interconnect technology up to a reach of 10 meters. LightBundle is purpose-built for multi-Tbps chip-to-chip interconnects in distributed computing, processor-to-memory disaggregation, and other advanced computing applications. LightBundle is based on arrays of novel GaN high-speed micro-emitters that leverage the microLED display manufacturing ecosystem and is fully compatible with high performance CMOS ICs.

Interconnects are becoming the key bottleneck in modern compute and network systems. Highly variable workloads are driving the evolution of densely interconnected, heterogeneous, software-defined clusters of CPUs, Graphical Processing Units (GPUs), Data Processing Units (DPUs) and shared memory blocks. Exploding Artificial Intelligence (AI) and Machine Learning (ML) workloads are exemplary of emerging applications driving an accelerating need for interconnects with extremely high density, low power consumption and low latency.

“The cloud and high-performance computing market is looking for a new class of energy efficient high bandwidth density interconnects,” said Vladimir Kozlov, Founder and CEO of LightCounting. “Avicena’s technology has the potential to deliver a paradigm shift in terms of power efficiency, bandwidth density, and reach.”

About the Technology

Today’s high-performance ICs use SerDes-based electrical links to achieve adequate IO density. However, the power consumption and bandwidth density of electrical links degrade quickly with length. Because optical interconnects have low attenuation, they have long been the prime contender to replace electrical interconnects for inter-chip communications. Unfortunately, conventional optical technologies (typically designed for networking applications) have been impractical for inter-processor and processor-memory interconnects due to their low bandwidth density, high power consumption, and inability to tolerate the high operating temperature of ASICs.

“All of this is changing with the recent progress in optical emitter technology driven by advances in the display industry,” says Bardia Pezeshki, founder and CEO of Avicena. “We have developed super-efficient, high-density optical transmitters based on emitter technology from the display industry. These innovative devices would have been impractical just a few years ago. Our optimized devices and materials support 10Gbps links per lane over -40°C to +125°C temperature with excellent reliability. We refer to our new optical sources as Cavity-Reinforced Optical Micro-Emitters or CROMEs. We connect CROME arrays with CMOS compatible PDs using multi-core fiber bundles to create massively parallel interconnects with 100s of parallel lanes with a density of 10Tbps/mm2 over a reach of up to 10m. We call this new class of optical interconnect the Avicena LightBundle.”

Avicena’s CROMEs are about an order of magnitude faster than the current state-of-the-art LEDs. At 200 parallel lanes this extrapolates to an aggregate link bandwidth of 2Tbps with a bandwidth density of 10Tbps/mm2.

The parallel nature of the LightBundle technology is well matched to parallel chiplet interfaces like AIB, HBI, and BoW, and can also be used to extend the reach of standard compute interconnects like PCIe/CXL, NVLink, and multi-channel DDR/GDDR memory links with low power and low latency.

About Avicena

Avicena Tech Corp. is a privately held company located in Mountain View, CA, specializing in the development of next-generation chip-to-chip interconnects that are more power efficient, offer higher bandwidth density and support longer reach than any current optical or electrical solution. Avicena’s technology is a key building block in the evolution of new computer architectures that will reduce the energy impact on our planet.


Source: Avicena Tech Corp.

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