Papers Vol. 6 num. 11 enero-junio 2010 by Nelson Darío Gómez–Cardona
En este trabajo se presenta un método no invasivo para la medición de microdeformaciones en estru... more En este trabajo se presenta un método no invasivo para la medición de microdeformaciones en estructuras de concreto usando sensores de redes de Bragg en fibras ópticas adheridos a su superficie. Se realizan mediciones en losas viales de concreto bajo una carga estática de 10 kN, encontrándose una relación aproximada de 2 : 1 entre la deformación registrada por los sensores y los valores arrojados por una simulación computacional con el método de elementos finitos. Se propone el uso de estos sensores para el monitoreo estructural de losas en una malla vial con sensores distribuidos y multiplexados por longitud de onda. Este es el primer reporte en Colombia de medición de deformación de losas viales usando sensores de fibra óptica.
Papers by Nelson Darío Gómez–Cardona
This thesis considers the phenomena associated with plasmon modes excited in MOFs, with a particu... more This thesis considers the phenomena associated with plasmon modes excited in MOFs, with a particular interest in higher-order plasmon modes and their coupling with propagation modes of the MOF. These multiple couplings, according to our prior knowledge, are the cause of the multiple resonances that occur in the transmittance spectrum of the SC-MOF. At this point, the study of symmetrical structures, in which the medium surrounding the metal film is homogeneous, and antisymmetric structures, in which the upper and lower media are different, was also addressed, but in these cases, multilayer structures were used because of it offers the possibility of modifying the propagation properties of the excited plasmon modes and tuning the resonance condition, improving the performance of the devices. Following this line of analysis, the excitation of plasmon modes in MOFs containing metal-filled holes was also considered. To facilitate the modeling of the structure and a better understanding ...
Frontiers in Optics / Laser Science, 2018
We propose a novel design for a refractive index (RI) sensor based on hybrid long-range plasmon i... more We propose a novel design for a refractive index (RI) sensor based on hybrid long-range plasmon in H-shaped microstructured optical fiber. Good sensitivity, as high as 6.1×103 nm/RIU, can be achieved in the proposed structure.
Photonics
This paper presents the design and analysis of a surface plasmon resonance (SPR) sensor in a phot... more This paper presents the design and analysis of a surface plasmon resonance (SPR) sensor in a photonic crystal fiber (PCF) platform, where graphene is used externally to attain improved sensing performance for an aqueous solution. The performance of the proposed sensor was analyzed using the finite element method-based simulation tool COMSOL Multiphysics. According to the simulation results, the proposed sensor exhibits identical linear characteristics as well as a very high figure of merit (FOM) of 2310.11 RIU−1 in the very low detection limit of 10−3. The analysis also reveals the maximum amplitude sensitivity of 14,847.03 RIU−1 and 7351.82 RIU−1 for the x and y polarized modes, respectively, which are high compared to several previously reported configurations. In addition, the average wavelength sensitivity is 2000 nm/RIU which is comparatively high for the analyte refractive index (RI) ranging from 1.331 to 1.339. Hence, it is highly expected that the proposed PCF-based SPR sens...
TecnoLógicas
En el presente trabajo se muestran varias configuraciones de una de cristal fotónico con huecos d... more En el presente trabajo se muestran varias configuraciones de una de cristal fotónico con huecos distribuidos de forma hexagonal para la compensación de dispersión cromática en enlaces de comunicaciones ópticas. Para el análisis de las fibras se usó el método de elementos finitos vectorial con frontera dispersiva. A partir de estos resultados se estimó la variación de la dispersión y la pendiente de la dispersión con respecto al cambio del diámetro de los agujeros de la microestructura. Con lo anterior fue posible obtener valores de dispersión en las bandas C y L de las telecomunicaciones cercanos a los -850 ps/nm*km, con pérdidas de confinamiento del orden de 10-3 dB/km.
Tecno Logicas, Oct 18, 2013
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Papers Vol. 6 num. 11 enero-junio 2010 by Nelson Darío Gómez–Cardona
Papers by Nelson Darío Gómez–Cardona