Abstracts
GPU-Accelerated Framework for Optical Communication System Design and Analysis Egor Sedov, Aston University
Fibre optical parametric amplifiers for optical communications
Vladimir Gordienko, Aston University Fibre optical parametric amplifiers (FOPA) can advance modern optical communications in many ways owing to their unique features. The FOPAs’ virtually wavelength agnostic operation can complement and provide the required flexibility for emerging multi-band optical communication
The research paper introduces a GPU-accelerated framework for optical communication system simulations, demonstrating its superior performance over traditional CPU-based methods. This framework addresses the growing complexity and computational demands in the field of optical
communication systems, providing a high-performance software solution tailored to their unique requirements. The key benefits of using GPU- based implementations include inherent parallelism, scalability, power efficiency, and the ability to handle large-scale matrix operations, vector manipulations, or Fourier transforms efficiently. The framework, built on TensorFlow and Python, is compatible with MATLAB and includes telecommunication components like the transmitter, optical channel model, receiver, and metrics evaluation block. It utilizes GPU-accelerated Split-Step Fourier Method (SSFM) implementations for efficient and accurate simulation of optical communication systems, supporting various configurations and customizations. Performance evaluation showed significant speedup with GPU, especially for larger problem sizes, enabling researchers to rapidly test hypotheses, iterate on designs, and explore a wider range of scenarios. STREAM 8: Telecoms / Free Space Optics Thursday 15:45 -17:15 Session Chair: Shabnam Noor, Research Associate, Aston University
systems, the hollow-core fibres revolution and free-space optical communications. The FOPAs’ ability for noiseless amplification can be advantageous for low signal-to-noise ratio applications. The FOPAs’ employment for all-optical wavelength conversion can pave the way for flexible and elastic optical networks. The FOPAs’ instantaneous response time is useful for ultrafast and transient-free applications. However, there are many challenges towards realisation of the FOPAs’ potential. In this talk I will review our latest achievements in the FOPAs research.
Mode division multiplexing technology: from ground to space
Feng Wen, University of Electronic Science and Technology of China The mode division multiplexing (MDM) technology is to open up the new dimension of fibers, enabling significantly increasing the capacity of optical fiber communication systems from the space domain. To implement the MDM
technology in the real transmission systems, the great efforts on the low-complex multiple-input multiple-output (MIMO) equalization have been made to reduce the cost of compensation operation for the high-capacity MDM systems. The hybrid algorithms, e.g., the transfer learning (TF), the genetic algorithm (GA) and the ant-colony optimization (ACO) modified MIMO equalizers have dramatically reduced the training cost, up to 100% compared to the conventional scheme. Moreover, the MDM technology is also considered in the free-space transmission scenario, such as the laser satellite communications. The wide-open channel brings the big challenge on the MDM implementation. The equalization algorithm as the powerful solution has been used to mitigate the impacts from the wireless laser channel, improving the transmission performance in the space satellite networks. 3.52 Tbps Dynamic Demultiplexing of Low-loss Spatial Modes in Strong Turbulence Using Reconfigurable Photonics Ultan Daly, University of Glasgow these systems it is critical to exploit several degrees of freedom, including wavelength, polarisation, and space. The spatial modes are acutely affected by atmospheric turbulence, where the challenges in overcoming the effects of the environment have prevented the wide-scale deployment of Spatial Division Multiplexing (SDM) in FSO. We will introduce a reconfigurable Si-photonics device that can continually measure the optical path and create optimised spatial modes that remain orthogonal after propagation, enabling SDM in 1 km channels with high optical turbulence. The device can measure the transmission matrix at kHz frequencies, fast enough to recover real time measurements of the atmospheric channel that can have a coherence time of up-to ~1ms. A singular value decomposition (SVD) is performed on the measured transmission matrix, determining a unique low-loss orthogonal basis for the channel, which is then demultiplexed by the Si-photonics platform. We aggregate 88-DWDM each with a 10 Gbps NRZ signal on 4-SVD channels, a 3.52 Tbps data rate is achieved for a simulated 1 km channel in high turbulence. Free-space optical (FSO) systems can provide high-capacity communication channels for bridging point-to-point links rapidly where fibre connections are unfeasible or for rapidly re-establishing connection in the event of cable breaks. To maximise the data-rate of
Heterogeneous Integration and Silicon Photonics: Enabling Optics at Scale Steve Alleston, OpenLight Photonics
Silicon photonics has emerged as the dominant technology in areas such as datacom and optical computing and is seen as enabling the next generation of AI driven datacenter architectures, quantum computing and machine vision. Despite this promise it is still treated as just one
technology choice amongst many with significant barriers to entry and many technical drawbacks. Heterogeneous integration addresses the material limitations of silicon and has been significant in some areas but to date it has been a proprietary technology and the domain of a select number of companies with large R and D budgets and plenty of patience. Now with the development of open PDKs and the emergence of commercially available reliable design tools from new and established vendors the ecosystem is becoming established to allow photonics to be developed and deployed much more like electronics with both economic and technical benefits.
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