Electronics and Electrical EngineeringMechanical Engineeringinformation sciencecomputingCommunication EngineeringComputer Science and Technologies

The Universitat Politècnica de Catalunya (UPC) is pleased to announce the 25th International Conference on Transparent Optical Networks (ICTON 2025), which will be hosted in Barcelona, Spain, from July 6th to 10th, 2025. This will mark the third time that ICTON takes place in Catalonia, following its previous editions in Barcelona in 2005 and Girona in 2017.

Barcelona, the vibrant capital of Catalonia, is a city renowned for its rich history, stunning architecture, and vibrant culture. Situated on the northeastern coast of Spain, Barcelona offers a perfect blend of modernity and tradition. Its iconic landmarks such as the Sagrada Família, Park Güell, and the Gothic Quarter are just a few examples of the city’s architectural wonders.

Easily accessible by plane through Barcelona-El Prat Airport and well-connected by train, Barcelona welcomes visitors with its Mediterranean climate, delicious cuisine, and lively atmosphere. From its beautiful beaches to the majestic Montserrat mountain, Barcelona offers countless opportunities for exploration and enjoyment.

We are excited to welcome you to Barcelona for the 25th edition of the ICTON Conference. Alongside a comprehensive technical program, attendees can look forward to engaging social events that showcase the best of Barcelona and its surroundings.

We look forward to hosting you in Barcelona for an unforgettable ICTON experience.

The Organizing Committee

Local Organizing Committee (registration, accommodation, logistics, social programme matters)
General Chair
Crina Cojocaru , Universitat Politècnica de Catalunya
Salvatore Spadaro, Universitat Politècnica de Catalunya
Honorary Chairs
Josep Solé-Pareta, Universitat Politècnica de Catalunya
Local Organizing Committee Members
Albert López, Universitat Politècnica de Catalunya


The scope of the Conference and co-located events is focused on the applications of transparent and all-optical technologies in telecommunications, computing, sensing, and novel fields. Conference topics include:
Molecular photonics
Nonlinear optics
Nanophotonics
Digital all-optical networks
Ultra-dense wavelength-division multiplexing
Ultra-fast optical time domain multiplexing
Next generation networking
Optical switching and routing
Optical packet networks and services
Optical memories and data storage
Optical transparency and network scalability
Network reliability and availability
Wireless and optical networking
Free-space optical communications
Radio-over-Fibre transmission
Broadband metro and access networks
Market in telecommunications
Microwave Photonics
Terahertz Photonics
Photonic band-gap structures
Photonic crystal fibres
Optical sensing, Fibre sensing
Nonlinear and active PBG devices
Nanoscale and ultrafast photonics
Quantum photonics
Quantum communications
Implementation of quantum communication infrastructures
VCSELs and other novel light sources
Fibre lasers
High power lasers
Microresonators and photonic molecules
Novel glasses and photonic materials
New transmission windows
Polarisation Mode Dispersion
Photonic component integration
Network planning and design tools
Big data analytics and network optimization
Non-conventional optical communications
Sub-wavelength photonic devices
Communication in transportation systems
Optical microscopy and nanoscopy techniques and applications
Optical inspection of transparent samples: quantitative phase imaging
3D optical imaging and display
Polarization-resolved optical microscopy
Image processing
Satellite communications
Label-free super-resolution and sensing
5G to 6G communications
Merging of optical and microwave technologies
Other relevant topics