PT-Sustain-ICT 2026 Abstracts

Area 1 - Photonic Technologies for a Sustainable ICT
Full Papers

Area 1 - Photonic Technologies for a Sustainable ICT

Full Papers
Paper Nr: 5
Title:

Enhanced Sensitivity in Fibre Loop Mirror Strain Sensor Based on Virtual Vernier Effect
Authors:

Paulo Robalinho, Vinícius Piaia, Susana Silva and Orlando Frazão
Abstract: The present study investigates the impact of a virtual Vernier effect in the fundamental state and first harmonic to enhance the sensitivity of a strain sensor. A fibre loop mirror (FLM) combined with an internal elliptical cladding (IEC) fibre section was used as the sensor, while a virtual reference spectrum derived from theoretical equations enabled the Vernier effect. For the individual sensor, a sensitivity of 15.39 ± 0.03 pmµε⁻¹ and a free spectral range (FSR) of 4.22 ± 0.01 nm are obtained. For the virtual Vernier effect, a detuning of 0.15 m is used in both states, resulting in an FSR of 30.2 ± 0.1 nm. A sensitivity of 109.8 ± 0.7 pmµε⁻¹ is achieved for the fundamental state, associated with a figure of merit (FoM) of 1.01 ± 0.03, and a sensitivity of 230 ± 2 pmµε⁻¹ for the first harmonic, associated with a figure of merit (FoM) of 2.1 ± 0.1. This work demonstrates the feasibility of implementing the virtual Vernier effect, not only enabling Vernier effect amplification but also reducing implementation complexity and increasing system robustness under harsh conditions.
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Nr: 60
Title:

Data-Distribution for the Reduction of Number of Amplifier Sites
Authors:

Silas Lasak Hedeboe, Arjun Kurur, Christian Schou, Oliver Malte Lülloff Larsen and Leif Katsuo Oxenløwe
Abstract: This submission describes a method to reduce the number of amplifier sites in optical networks. By distributing the data carried by one fibre to several fibres the SNR requirement in each fibre drops considerably, this may be used to increase the spacing between amplifiers from e.g. 50 km to 165 km. This could lead to new network designs with 150 km or more spacing between amplifier huts, or submarine cables with 150 km between repeaters. This would add to the flexibility of network designs to e.g. avoid sensitive equipment in areas prone to floodings, or reduce sensitive repeater parts of submarine cables prone to failure during deployment. The resource used for amplifier sites can also be greatly reduced with this concept.
Nr: 72
Title:

Toward Sustainable Data Transmission: Environmental Assessment of a Fixed Optical Telecommunication Network in Sweden in 2024
Authors:

Gudrun Fjola Gudmundsdottir and Leif Katsuo Oxenløwe
Abstract: The environmental assessment of a fixed optical telecommunication network in Sweden is highlighted from the point of view of carbon emissions, Life Cycle Assessment and Absolute Environmental Sustainability Assessment. Using industry data, it was found that embodied emissions are the most significant, as well as resource usage. The telecommunication network could not be considered sustainable in absolute terms and recommendations given to stabilize and reduce emissions from a network operating perspective.
Nr: 77
Title:

Single Microcomb for Efficient Ultra-Scalable Data Centres
Authors:

Christian Schou, Silas Lasak Hedeboe, Arjun Kurur, Oliver Malte Lülloff Larsen, Yang Liu, Deming Kong, Minhao Pu, Kresten Yvind and Leif Katsuo Oxenløwe
Abstract: In this abstract we propose and experimentally characterize a method to reduce the number of lasers in a data centre and increase the efficiency by using a single optical frequency microcomb as the only light source, which is distributed across an entire data centre. Here a microcomb is split into 4096 SDM channels and by using the most lossy branch we measure 44.6 Tbit/s distributed over 245 WDM channels and with a total estimated capacity of 182.5 Pbit/s.
Nr: 88
Title:

Session 1: Context and Needs, Towards a Austainable ICT
Authors:

Olivier Bouchet
Abstract: Within the framework of this session, the objective is to present, first, the overall context and guidelines for a sustainable ICT. This is followed by a presentation of the flagship European project in the field of sustainable development, "SUSTAIN 6G." Next, there is an introduction to the principle of "Design for Impacts" for MNOs, and finally, a overview is held on energy-efficient networks using optics.
Nr: 89
Title:

Introduction of the Optical Networking Session of the Workshop, by Positoning Optical Systems and Networks in a Sustainable ICT
Authors:

Dominique Chiaroni
Abstract: Designing a sustainable ICT needs to identify key technology enablers facilitating the building of energy efficient solutions. In this session, to introduce the session, we will describe the general context and the motivation for an optical technology at the system but also at the network level. So before going into the detailed presentations of this session, some key directions to follow through the introduction of optical technologies as key enabling technologies for a sustainable ICT will be given. Finally, an introduction of the invited speakers and their positioning in the scope targeted will be made.
Nr: 91
Title:

Introduction of Session II: Key Optical Technologies for a Sustainable ICT
Authors:

Leif Katsuo Oxenløwe
Abstract: This session will touch upon recent developments of technologies aiming at being more energy-efficient. A particular focus will be on the GreenCOM project, funded by the Innovation Fund Denmark, and there will be presentations on quasi-coherent energy-efficient transceivers, fibre-system designs for minimising the number of amplifiers sites and ultra-scalable light sources based on frequency combs.
Nr: 92
Title:

Optical Wireless Communication: A Key Enabling Technology for a Sustainable ICT
Authors:

Marc Fleschen
Abstract: The need for sustainable solutions pushes industrials to identify new enabling technologies able to save energies but also to provide concrete answers to new societal rules with an economic vision for a long term impact. In many publications, the Optical Wireless Technology has demonstrated its potential to offer a complementary technology with respect to the Radio frequency technology when we need services at ultra-high bit rates. In this presentation we will show that the OWC, when used as a Fixed Wireless Access (FWA) technology, in complementarity with a RF technology to offer a mobility, can be extremely energy efficient. To help this new direction identified, the role of the Light Communication Alliance will be highlighted and perspectives for new market segments will be described. This presentation will then position the OWC as a key technology enabler for a Sustainable ICT.
Nr: 95
Title:

Quasi-Coherent Transceiver Technologies for Extended Reach DWDM Access Networks
Authors:

Jesper Bevensee Jensen, José Antonio Altabas, Lorenza Amati, Onur Düzgöl, Claus Jørgensen, Omar Gallardo, Rakshick Shrinivas, Michele Squartecchia and Arsen Turhaner
Abstract: DSP-free Quasi-Coherent transceivers offer a unique combination of high sensitivity, high dispersion tolerance, low power consumption and compactness that makes them a key technology for future DWDM access and mobile front-haul networks. This presentation will show our the latest progress on the development and packaging of quasi-coherent transceivers based on silicon photonic integrated circuits (Si-PIC) with analog chromatic dispersion compensation (CDC) techniques included on an electronic integrated circuit (EIC). 25 Gbps C-band transmission with 40 km standard single mode fiber (SSMF) reach is presented.
Nr: 96
Title:

Optical Functionalities to Curb Network Power Consumption: Can Digital Twins Solve the Cross-Layer Problem?
Authors:

Cédric Ware and Mounia Lourdiane
Abstract: After decades of research, still few all-optical functionalities have been deployed outside the lab, despite their potential to reduce network power consumption by leveraging optical systems' lower energy per bit. A major issue is that optical functionalities typically don't fit neatly into the conventional layered-network paradigm — which on the other hand enables modularity and interoperability. In a complex network environment, operators are pushing to develop digital twins and other types of software tools for network planning and operational management. This raises the question: can such tools also enable integration of more all-optical functionalities by wrapping software layers around their specificities? We are currently working on network simulation tools sufficiently generic and flexible to allow testing this potential in a variety of scenarios and use cases.