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Martínez Matos, Óscar ; Cheben, Pavel ; Schmid, Jens H. ; Bogdanov, Alexei L. ; Calvo Padilla, María Luisa ; Delâge, André ; Densmore, Adam ; Janz, Siegfried ; Lamontagne, Boris ; Lapointe, Jean ; Post, Edith ; Powell, Ian ; Rodrigo Martín-Romo, José Augusto ; Waldron, Phillip ; Xu, Dan-Xia | IEEE | 2006We present several new concepts to extend the capabilities of arrayed waveguide grating spectrometers. Strong lateral mode confinement wavegaide structure in the focal plane is used to increase resolution, a Michelson-type AWG spectrometer can i[...]texto impreso
The authors present a mathematically exact formulation of the initial field striking the aperture of an absorbing optical waveguide, via an integral equation description. An analysis of the residual scattering by the waveguide is presented. Beca[...]texto impreso
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Weigand Talavera, Rosa María ; Calvo Padilla, María Luisa ; Gonzalo Fonrodona, Isabel ; Villafranca Velasco, Aitor | 2017-01Se generaran topografías FDTD en sistemas fotónicos para ejemplificación en clase por parte del profesor, realización de trabajos en grupo, realización de prácticas de laboratorio, autoaprendizaje del alumno y Trabajos Fin de Grado y Máster.texto impreso
Rodrigo Martín-Romo, José Augusto ; Alieva, Tatiana Krasheninnikova ; Calvo Padilla, María Luisa | Elsevier Science BV | 2007-10-15Gyrator transform is a new tool for manipulation of two-dimensional signals such as images or laser beam profiles. Here we demonstrate various applications of the gyrator transform for image processing. Several aspects such as noise reduction, f[...]texto impreso
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Carreras Béjar, Carmen ; Chevalier del Río, Margarita ; Calvo Padilla, María Luisa | SPIE--The International Society for Optical Engineering | 1984In this paper, we present a theoretical model for the transmission function of a biological cell. Three different cases have been considered: a) Real transmission function, b) Pure phase Object, c) Mixed case where both, real and complex terms a[...]texto impreso
Varela Vargas, Alberto J. ; Calvo Padilla, María Luisa | Spie-Soc Photo-Optical Instrumentation Engineers | 1995-04We present a comparative study between two experimental methods to determine the modulation transfer function (MTF) of a hololens system. The two hololenses were previously recorded and tested for filtering pseudocolor. In the first method we us[...]texto impreso
Martínez Matos, Óscar ; Calvo Padilla, María Luisa ; Cheben, Pavel ; Janz, Siegfried ; Rodrigo Martín-Romo, José Augusto ; Xu, Dan-Xia ; Delâge, André | IEEE - Inst. Electrical Electronics Engineers Inc. | 2006-03The authors propose a new wavelength-dispersive principle based on waveguide group-index modification and apply this principle in a new type of arrayed waveguide dispersive element based on modified group index. The element is composed by an arr[...]texto impreso
Villafranca Velasco, Aitor ; Bock, Przemek J. ; Cheben, Pavel ; Calvo Padilla, María Luisa ; Schmid, Jens H. ; Lapointe, Jean ; Xu, Dan-Xia ; Janz, Siegfried ; Delâge, André | The Institution of Engineering and Technology (IET) | 2012-06-07The fabrication and experimental characterisation of a two-stage bandpass filter based on curved waveguide sidewall gratings is reported for the silicon-on-insulator platform. At each cascaded filtering stage, the spectral components of the inpu[...]texto impreso
Martínez Matos, Óscar ; Rodrigo Martín-Romo, José Augusto ; Alieva, Tatiana Krasheninnikova ; Cámara, Alejandro ; Cheben, Pavel ; Calvo Padilla, María Luisa | The Optical Society Of America | 2011-03-28In this work, we propose a robust and versatile approach for the characterization of the complex field amplitude of holographically generated coherent-scalar paraxial beams. For this purpose we apply an iterative algorithm that allows recovering[...]texto impreso
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Guibelalde del Castillo, Eduardo ; Calvo Padilla, María Luisa | Spie-Soc Photo-Optical Instrumentation Engineers | 1987-06A new integral equation is presented and solved by a matrix method based on iterative procedures to obtain information about the transmission and reflection of light (scalar field) in inhomogeneous media. The method, which may be applied to a wi[...]texto impreso
The physical possibility of neutron fibres, proposed in a previous paper, is reviewed briefly. Further possibilities and results are reported specifically about : (a) magnetized fibres, (b) propagation modes in homogeneous circular fibres (upper[...]texto impreso
In this work we present a general formulation of the corrections to the Raman-Nath approximation for the diffracted field by a volume hologram, based on integral equations. An approximate analytic expression is given for the first correction. Nu[...]
