An All-Optical General-Purpose CPU And Optical Computer Architecture (Akhetonics)


A technical paper titled “An All-Optical General-Purpose CPU and Optical Computer Architecture” was published by researchers at Akhetonics. Abstract: "Energy efficiency of electronic digital processors is primarily limited by the energy consumption of electronic communication and interconnects. The industry is almost unanimously pushing towards replacing both long-haul, as well as local c... » read more

Shedding More Light On Photonics For Multi-Die Systems


By Kenneth Larsen and Twan Korthorst Photonics harness the speed of light for fast, low-power, high-capacity data transfer. A tremendous amount of data needs to be moved swiftly across different components in a multi-die system. Considering this, exploiting the advantages of light is one way to mitigate heat dissipation and energy consumption concerns while delivering fast data transmission.... » read more

AI Drives Need For Optical Interconnects In Data Centers


An explosion of data, driven by more sensors everywhere and the inclusion of AI/ML in just about everything, is ratcheting up the pressure on data centers to leverage optical interconnects to speed up data throughput and reduce latency. Optical communication has been in use for several decades, starting with long-haul communications, and evolving from there to connect external storage to ser... » read more

Research Bits: September 19


Measuring lithography plasma sources Researchers from the University of Twente developed a tool that can measure the size of a plasma source and the color of the light it emits simultaneously, which they say could be used to improve lithography machines. “Traditionally, we could only look at the amount of light produced, but to further improve the chipmaking process, we also want to study... » read more

Impact of Semiconductor Optical Amplifers On Performance & Power Consumption in Data Centers (UCSB)


A new technical paper titled "Integrated SOAs enable energy-efficient intra-data center coherent links" was published by researchers at UC Santa Barbara. "In this work, we analyze the impact of integrated semiconductor optical amplifiers (SOAs) on link performance and power consumption, and describe the optimal design spaces for low-cost and energy-efficient coherent links. Placing SOAs afte... » read more

Multi-Wavelength, Multimode Communication Scheme For On-Chip and Chip-to-Chip Interconnects


A technical paper titled "Multi-dimensional data transmission using inverse-designed silicon photonics and microcombs" was published by researchers at Stanford, Harvard, University of Central Florida, NIST, and others. "Here we demonstrate an integrated multi-dimensional communication scheme that combines wavelength- and mode- multiplexing on a silicon photonic circuit. Using foundry-compati... » read more

Chip Sandwich: Electronics Chip & Photonics Chip Co-Optimized To Work Together (CalTech/Univ. of Southampton)


A technical paper titled "A 100-Gb/s PAM4 Optical Transmitter in a 3-D-Integrated SiPh-CMOS Platform Using Segmented MOSCAP Modulators" was published by researchers at CalTech and University of Southampton. "The resulting optimized interface between the two chips allows them to transmit 100 gigabits of data per second while producing just 2.4 pico-Joules per transmitted bit. This improves th... » read more

On-chip 2D/3D Photonics Integration Solution Using Deposited Polycrystalline Silicon for Optical Interconnects Applications


A new technical paper titled "Polycrystalline silicon PhC cavities for CMOS on-chip integration" was published by researchers at Tyndall National Institute, Munster Technological University, and Université Grenoble Alpes, CEA, LETI. "In this work, we present an on-chip 2D and 3D photonics integration solution compatible with Front End of Line integration (FEOL) using deposited polycrystalli... » read more

Co-Packaged Optics And The Evolution Of Switch/Optical Interconnects In Data Centers


Driven by a need to reduce power and increase bandwidth density in data center network switches and other devices, the data networking industry is moving toward adoption of co-packaged optics (CPO). This paper provides a brief overview of the history of copper and optical interconnects, the limitations of existing interconnect solutions, and the future of co-packaged optics, including the benef... » read more

Startup Funding: November 2020


Numerous chipmakers pulled in funding in November 2020, with investors putting money into interconnects, memories, AI hardware, and quantum computing. Launching from stealth was a startup aiming to combine AI and 5G. Autonomous delivery did well, too, with one company raising a massive $500M. This month, we take a look at 28 companies that raised a collective $1.1B. Semi & design Connec... » read more

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