Poster Session Abstracts
Integrated Photonic Computing for Equalization of Coherent Signals Sarah Masaad, Ugent – imec The presentation will discuss the use of photonic
Improving the sensitivity of 25Gb/s avalanche photodiodes using AlGaAsSb avalanche region Chee Hing Tan, University of Sheffield
Al0.85Ga0.15As0.56Sb0.44 (AlGaAsSb) has been shown to have very low excess noise factor due to the dominance of electron initiated impact ionization chain. This electron-dominated multiplication process should also lead to a high gain-bandwidth product making AlGaAsSb
processing, realized through an integrated reservoir computing architecture, to aid and replace digital signal processing. This aims to unlock wider deployment of coherent modulation in short- and mid-reach communication systems
through simplifying the signal processing requirements. Experimental results achieved on processing 4 QAM and 16 QAM signals at 28 Gbaud transmission rates will also be presented..
extremely attractive for high speed optical communication. In this work we investigated the effects of avalanche and absorption layer thicknesses on the gain-bandwidth product of an InGaAs/AlGaAsSb APD. From 400 InGaAs/AlGaAsSb APD designs, we show that bandwidth of 18.7 GHz can be achieved at gain of 10, such that the APD can operate at 25 Gb/s bit rate. Using a thin avalanche region of 100 nm, our simulations suggest InGaAs/AlGaAsSb APD can achieve a sensitivity improvement of 6.3 dBm and 4.5 dBm (BER of 5×10 5 at 25 Gb/s) over state of the art InGaAs/InAlAs APD and Ge/Si APD, respectively. .
Ultra Low Loss Interconnects
Guy Nurse, Diamond SA Diamond’s high performance interconnects, renowned for their ultra low-loss values, represent the pinnacle of the industry, surpassing conventional standards. Using only the highest quality materials, these interconnects are engineered to deliver optimum performance and
Scan to watch poster preview.
unmatched reliability. The cornerstone is the meticulous Active Core Alignment (ACA) process, seamlessly integrated with advanced fibre optic component manufacturing techniques, honed and perfected over two decades. Diamond’s primary mission has been to redefine what’s possible in fibre optic connectivity, and this dedication is reflected in ultra low-loss (Insertion Loss IL) values. By deforming the end face after fibre polymerization, the ACA process achieves precise alignment and reduces fibre-to-fibre eccentricity to unprecedented levels. The result is an IL as low as 0.05dB – a remarkable achievement that exceeds industry standards. Additionally Diamond can extend these benefits to polarization maintaining (PM) fibres, where our technology exceeds the IL performance of any other technology on the market. There are many applications for ULL interconnects including quantum sensing and communications..
Quantum Annealing for resource allocation in optical networking
Victor Virag, Alejandra Beghelli, UCL We explore the application of quantum and hybrid optimization techniques to solve the Wavelength Allocation (WA) and Routing and Wavelength Allocation (RWA) problems in static WDM optical networks. For WA, we benchmark Quantum Annealing (QA), Hybrid Annealing (HA),
and Simulated Annealing (SA) against the classical LDF heuristic and the exact solution. For RWA, we introduce and solve a novel QUBO formulation, focusing on minimizing link utilization and verifying solution optimality with brute-force methods. WA results show that the classical LDF heuristic consistently outperforms quantum and hybrid solvers in both computation time and solution quality, with the exact solution struggling on larger instances. For RWA, quantum and quantum-inspired solvers yield optimal solutions but require careful parameter tuning and does not scale well. Our key contributions include the first comparison of QA, HA, and SA for WA on real-world network topologies and the introduction of a novel QUBO formulation for static RWA..
Scan to watch poster preview.
High gain U-band discrete Raman amplifiers for U-band coherent transmission Dini Pratiwi, PhD Student, Aston University
We present high gain incoherently pumped U-band discrete Raman amplifiers using three different Raman gain fibres: highly nonlinear fibre (HNLF), inverse dispersion fibre (IDF) and highly nonlinear dispersion shifted fibre (HNLDSF). The highest net gain of 22.3 dB at 1646 nm was
Scan to watch poster preview.
achieved by HNLF, with noise figure of 4.2 dB. HNLDSF gave ~4.8 dB higher gain than IDF. These U-band discrete Raman amplifiers were used for C+L+U coherent transmission using 516×24.5GBd/s DP-64/256QAM channels achieving 123.46 Tbps decoded data rate covering ~125 nm bandwidth over 50 km standard single mode fibre (SSMF). .
Scan to watch poster preview.
15
Made with FlippingBook flipbook maker