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Keynote Lectures

Fabrication of Guided-Wave Optical Devices by Laser Direct Writing and Applications
Paulo Marques, FCUP / INESC Porto, Portugal

Some Relations between Visual Perception and Non-Linear Photonic Structures
José A. Martín-Pereda, Polytechnic University of Madrid, Spain

Versatile, All-fibre based Sources
Roy Taylor, Imperial College London, United Kingdom


Fabrication of Guided-Wave Optical Devices by Laser Direct Writing and Applications

Paulo Marques

Brief Bio

Paulo Marques was born in Coruche, Portugal, in 1968. He received a PhD in Physics (2000) from the University of Porto, Portugal. Currently is an Assistant Professor at the Physics and Astronomy Department at Porto University.
Since July 2000 he develops research activity in the Optoelectronics and Electronics Systems Unit (UOSE) of INESC PORTO. His research activities include hybrid sol-gel based waveguides, optical photosensitivity, Bragg gratings, integrated optical sensors and laser direct writing techniques for integrated optics and microfabrication in general.
Since October 2009 is the coordinator of the Optoelectronics and Electronics Systems Unit of INESC Porto.


This lecture will review in detail the fabrication of devices in fiber and integrated optics platforms using linear and non-linear laser direct writing processes. Fabrication of complex Bragg gratings with UV lasers in germanium doped silica will be analysed as well as photopolymerization of sensitive materials. The application of femtosecond lasers in the fabrication of waveguides and devices in undoped silica will be reviewed.  Finally, examples of applications in areas such as optical communications, sensing and astronomical interferometry will be given.



Some Relations between Visual Perception and Non-Linear Photonic Structures

José A. Martín-Pereda
Polytechnic University of Madrid

Brief Bio

José A. Martín-Pereda has a Telecommunications Engineer degree from the Polytechnic University of Madrid (June, 1967), a BSc in Physical Sciences from Complutense University, Madrid (June, 1967) and a PhD in Telecommunications Engineering from the Polytechnic University of Madrid (June, 1971).
He has held the positions of Deputy Director of Research at ETSIT (1976-1980), Deputy Rector of Research at UPM (1980-1985), and Director of the “Photonic Technology” Department of UPM (1997-2002), creating the latter in 1985.
He was member of the Universities Council, nominated by the Senate, from 1995 to 2000, and member of the Technical Committee of the ECOC ("European Conference on Optical Communications") and of OFC / I00C ("Optical Fibre Communication Conference" and "Integrated Optics and Optical Communications") in the USA, Japan and Europe from 1984 to 1996.
He was the first in Spain to work in the fields of optical communications and liquid crystal applications in photonic devices, working in these fields since 1975. He was a pioneer in the study of optical bistability and chaotic phenomena, and applied optical computing and photonic switching for optical communications networks. He created the first Optical Communications school in Spain, training numerous professionals and university researchers; he was the first to introduce this field into the curricula of Telecommunications Engineering Schools in Spain (since 1980) and the first to introduce the concept of photonics. Having published more than 100 technical articles in Journals and International Congresses, including one book as author and several others as co-author, he wrote many other articles on the aforementioned subjects, including scientific politics, for Spanish magazines and journals. Bimonthly columnist in the “R&D Supplement” of a national newspaper, from 1990 to 1994.
He received several scientific prizes for research work and holds an “Honorary Doctorate” from the Polytechnic University of Catalonia. He was a Visiting Professor at the "Centre for the History of Science, Technology and Medicine", at Imperial College, London, UK, during 2004-05. In 1994, he became a founding member of the Royal Spanish Academy of Engineering.


The main objective will be to present a way to emulate some functions of the mammalian visual system and a model to analyse subjective sensations and visual illusions.
It is well known that the main difference between sensing in living bodies and in artificial systems is that living bodies are able to interpret stimuli, that is, environmental stimuli whereas artificial systems sense external impressions according to previous rules and no interpretation is usually adopted. The respective responses of biological sense organs correspond to statements by the subject about his sensations and perceptions and responses of artificial organs correspond to fixed rules.
Some topics to be considered will be: a summary of the Mammalian Visual System, mainly of the Retina and the Visual Cortex, and an analyse of the responses of some Photonic devices with non linear behaviour. With this basis, a Retina simulation will be presented as well as a model for motion detection. The talk will present some Geometrical and Visual Illusions and will give an analysis of the Müller-Lyer, Zöllner, Wundt and  Hering Illusions.



Versatile, All-fibre based Sources

Roy Taylor
Imperial College London
United Kingdom

Brief Bio
Roy Taylor was born in Carrickfergus, N. Ireland in 1949. He obtained a BSc (1stHons) in physics from the Queen’s University of Belfast and commenced his research career at the Queen’s University in 1971. In 1973 he transferred to the Optics Section at Imperial College and obtained his PhD in 1974. After spending two years at the Technical University in Munich he returned to Imperial College in 1977 as a research assistant. He established the Femtosecond Optics Group at Imperial College in 1986 and over his career has published more than 370 papers and coauthored over 400 conference presentations. His work and contributions in various aspects of laser research, photonics, optical fibres and non linear optics has been recognised by the Carl Zeiss Research Award and also by the Institute of Physics Thomas Young Medal, the Imperial College Research Excellence Award and the Rumford Medal of the Royal Society.


All optical fibre based devices offer extensive versatility of wavelength, pulse format and duration, probably best exemplified by the fibre based supercontinuum or “white light laser” source. Despite its versatility, other techniques probably allow more efficient routes to diversity. In this presentation I will illustrate the extensive versatility with fibre based devices, with reference to supercontinuum sources, both pulsed and cw pumped, mode locked fibre lasers, both in the soliton and normally dispersive regimes, including Raman based devices for broad wavelength coverage, as well as all- fibre optical parametric oscillators and  novel high repetition rate sources.