Abstracts - Tuesday 14th February
STREAM TWO: Photonics for RAN (continued) 10:00 - 10:15 Fiber-optic link extensions by embedded THz wireless connections Braulio Gomez Saveerda, VPI Photonics
STREAM ONE: Data Centres
Session Chair: Fotini Karinou, Senior Researcher, Microsoft Research
11:00 - 11:30 Enabling technologies for 800Gb/s and 1.6Tb/s optical interconnects for future data Maxim Kuschnerov Huawei
THz wireless links with carrier frequencies beyond the W band represent an attractive way to extend existing fiber-optic network infrastructure. Such system configurations are advantageous for broadband access networks in dense urban areas, ad hoc networks of large events, or applications where fiber cable deployment is impractical.
The path towards 1.6TbE will require 200G/ lane optical technology, which could be used both for intensity modulated direct detection (IMDD) schemes and coherent optics. A higher parallelization will be needed going forward and the baud rate vs. number of lane trade-off is driven by the availability requirement of the
The design of these hybrid networks requires special attention, as the THz wireless propagation characteristics are affected by weather and atmospheric effects influencing the signal performance dynamically. We investigate within the collaborative project AI-NET-PROTECT alternatives for link architectures and analog interfaces to enable seamless interconnection between the optical fiber and the THz wireless extender of the hybrid links. We present statistical information about weather conditions to derive channel models for wireless transmission and analyze its impact on system performance. Additionally, we demonstrate the applicability of variable rate and spectral efficient modulation formats and the robustness of conventional DSP algorithms exclusively developed for optical fiber transmission when deployed to the combined fiber-optical/THz-wireless link. 10:15 - 10:30 Novel Low Loss Metallic Fibre-to-Chip Coupling for Quantuam Photonic Integrated Circuit Applications Michael O'Farrell, Senko
market. Going forward IMDD technology is facing basic limitations and the question needs to be analyzed whether these can be solved or the transition towards coherent optics is inevitable. 11:30 - 12:00 Photonic networks with nanoseconds switching and control for distributed machine learning systems Dr. Nicola Calabretta, Eindhoven University of Technology
FDiverse cloud workloads and AI applications with different requirements result in a 40% underutilization of the servers in conventional server-centric architecture with huge waste of resources and power consumption as well degradation of the application performance when
Quantum technology has been identified as a key emerging and transformative technology that will have an impact on the UK’s long term digital and economic future. One of the key technologies for the successful adoption of Quantum Technology is the use of Integrated quantum photonics uses photonic integrated circuits (QPICs) to control
available resources cannot meet application requirements, particularly for AI computing clustering. To flexibly accommodate various computing nodes and memory intensive applications, a novel disaggregated DCN architecture consisting of independent hardware (like XPU, memory, and storage) nodes, innovative DC networks with low latency and high bandwidth are crucial to support the network performance of disaggregated architecture. The talk will discuss the requirements of latency and bandwidth as well as the photonic switching technology to implement the disaggregated network infrastructure. We present an experimental prototype rack-scale disaggregated architecture based on nanoseconds optical switches and discussed the network performance assessment in terms of latency and bandwidth. 12:00 - 12:30 Enabling low and stable latency communication using clock and frequency referenced access networks Zhixin Liu, UCL
photonic quantum states for applications in quantum technologies. As such, QPICs will provide a promising approach to the miniaturisation and scaling up of optical quantum circuits. Our focus has been on addressing the challenge of coupling optical signals at the I/O ports of the QPICs. One of the potentially viable technologies to address this challenge is the Metallic PIC Connectors (MPCs). MPCs are stamped components with micro mirrors that redirect your light beams, focus (or expand) your light beams or reshape the mode field. They are stamped with sub-micron tolerances which is sufficient for single-mode optics. The MPCs also has low coefficients of thermal expansion, suitable for conventional solder reflow application.
HThe rise of timing-critical applications such as virtual reality and connected car fleets, combined with the rapid growth of the number of user devices, creates new challenges for the latency and reliability of user-cloud data communications. Currently user-cloud communications rely on time-scheduled data frames through tree-
topology fibre networks, incapable of assuring guaranteed connections with low or stable latency, which is necessary for, e.g. remote surgeries and safe operations of self-driven cars. Besides, their scalability to a larger user count is limited. Here we show that clock and optical frequency synchronisation, enabled by burgeoning frequency comb and signal processing techniques, can provide each user with dedicated optical bandwidth to enable scalable user-cloud communications that guarantees simultaneously high per-use data rate and low latency. Our approach provides accurate clock and optical frequency synchronisation over deployed optical fibre links, which will be beneficial for many applications including accurate navigation, quantum communications, and astronomy.
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02/02/2023 09:29:54
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