Maria Luisa Calvo

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On the basis of a matrix formalism, we analyze the paraxial optical systems composed by generalized lenses and fixed free-space intervals, suitable for orthosymplectic transformations in phase space. Flexible configurations to perform the attractive operations for optical information processing such as image rotation, separable fractional Fourier(More)
In this paper we review the progress achieved in optical information processing during the last decade by applying fractional linear integral transforms. The fractional Fourier transform and its applications for phase retrieval, beam characterization, space-variant pattern recognition, adaptive filter design, encryption, watermarking, etc., is discussed in(More)
The importance of the amplitude and phase in the fractional Fourier transform (FT) domain is analyzed on the basis of the rectangular signal and the real-world image. The quality of signal restoration from only the amplitude or from only the phase of its fractional FT by applying the inverse fractional FT is considered. It is shown that the signal(More)
In this work we explore the possibilities of incorporating a specific type of Ionic Liquid (IL) in the synthesis of photopolymerizable glasses using sol-gel techniques. For this purpose, three different photomaterials were synthesized, characterized and compared: our previously developed photopolymerizable glass incorporating a High Refractive Index Species(More)
1 The question of the importance of phase and amplitude in the Fourier domain has been studied in many publications [1–4]. There is a widespread belief that the Fourier phase is more important than the Fourier amplitude , based on the fact that the main characteristics of natural images can be recovered from phase-only data by applying the inverse Fourier(More)
We report our advances in development of subwavelength engineered waveguide structures. This unique NRC patented technology [1,2] allows synthesis of a metamaterial with an unprecedented control of material properties, constituting a powerful tool for a designer of photonic integrated circuits. We have demonstrated a number of subwavelength engineered(More)
The silicon photonic wire evanescent field (PWEF) sensor platform offers the advantages of small sensor size, high levels of function integration, and low cost manufacturing that comes with the use of established semiconductor fabrication processes. The technology should be fully compatible with existing infrastructure in molecular analysis and research and(More)
We report a spatial heterodyne Fourier-transform spectrometer consisting of an array of Mach-Zehnder interferometers (MZI) implemented in silicon microphotonics. Optical path differences between the MZI arms increase linearly along the array, generating a wavelength-dependent interferogram which enables the retrieval of the source spectrum with a single(More)
We present an overview of the main properties and the emerging implementations corresponding to a photopolymerizable glass modified with high refractive index species (HRIS) incorporated at molecular level. The main characteristic of the HRIS photopolymerizable glass is the codirectional diffusion enhancement of monomer and HRIS species upon inhomogeneous(More)