Coloring Optical Signals For More Bandwidth In Data Centers


Copper cabling has been the workhorse for moving data inside of AI and HPC data centers, but fiber is nipping at its heels. Optics brings three possible bandwidth multipliers — wavelength-division multiplexing (WDM), the use of different modes, and polarization. Each has a role in longer-distance optical links, but the tradeoffs are different in the data center. WDM appears poised to boost... » read more

Double Intra-Cavity VCSELs: Properties And Design Challenges At Cryogenic Temperatures (Tampere Univ.)


A new technical paper titled "Thermal characteristics of a double intra-cavity contact VCSEL for cryogenic optical links" was published by researchers at Tampere University. Excerpt "Cryogenic computing systems, including quantum computers, cryo-CMOS and superconducting processors, necessitate efficient optical data links capable of operation at temperatures as low as 4 K. Vertical-cavity s... » read more

Why PCIe 7.0 Over Optics


By Keivan Javadi Khasraghi and Ruben Sousa Data centers are currently facing the increasing need to enhance their bandwidth capacities. This surge is largely driven by the rise of new technologies, especially the growing demand for AI and machine learning applications. As these technologies advance, bandwidth requirements are projected to expand dramatically. As Large Language Models (LLMs) ... » read more