Open Access
Analog electronics projects to encourage active learning
(IEEE, 2024-08-01) Escribano Simón, Leyre; Tainta Ausejo, Santiago; Erro Betrán, María José; Ingeniería Eléctrica, Electrónica y de Comunicación; Ingeniaritza Elektrikoa, Elektronikoa eta Telekomunikazio Ingeniaritza; Universidad Pública de Navarra / Nafarroako Unibertsitate Publikoa, PINNE2022-UPNA
In this work we present a proposal to include Project Based Learning (PBL) in an Analog Electronics course. For this purpose, several projects have been developed to be implemented in an advanced degree course, covering advanced concepts related to amplifiers, oscillators, and active filters. The results obtained after the rollout of one of these projects in an Industrial Engineering degree course are reported.
Open Access
Application of active methodologies based on real cases - university-industry collaboration
(IEEE, 2024-08-01) Andueza Unanua, Ángel María; Urrutia Azcona, Aitor; Erro Betrán, María José; Ruiz Zamarreño, Carlos; Leandro González, Daniel; Elosúa Aguado, César; Socorro Leránoz, Abián Bentor; Goicoechea Fernández, Javier; Ingeniería Eléctrica, Electrónica y de Comunicación; Ingeniaritza Elektrikoa, Elektronikoa eta Telekomunikazio Ingeniaritza; Universidad Pública de Navarra / Nafarroako Unibertsitate Publikoa, PINNE2022-UPNA
During the last academic years, the industrial electronics specialties of the Industrial Engineering Bachelor's Degrees of the Public University of Navarra (UPNA) suffered a gradual loss of students. In order to reverse this trend, a teaching innovation project was designed based on the planned use of active learning methodologies in collaboration with Navarra's leading companies in industrial electronics. The project aims to enhance student learning by making teaching more engaging and practical, as well as boost the social visibility of electronics by improving the perception among students of this strategic industrial sector in the region of Navarra.
Open Access
Characterization of microring filters for differential group delay applications
(IEEE, 2017) Doménech, D.; Chamorro Posada, P.; Fraile Pelaez, F.J.; Erro Betrán, María José; Tainta Ausejo, Santiago; Muriel, M. A.; Baños, R.; Bolten, J.; Kleinjans, H.; Ingeniaritza Elektrikoa eta Elektronikoa; Institute of Smart Cities - ISC; Ingeniería Eléctrica y Electrónica
The longitudinal offset technique permits to improve the accuracy of the coupling coefficients of integrated directional couplers and provides designs that can be easily implemented with current fabrication tolerances. In this work, we address the additional degree of freedom offered by this technology in order to tailor the differential group delay in coupled-resonator optical filters. We present the characterization of several devices exploiting this feature and we discuss their potential applications
Open Access
Modulated fiber ring laser and its application in high-sensitivity temperature sensors
(SPIE, 2016) Pérez Herrera, Rosa Ana; Tainta Ausejo, Santiago; Erro Betrán, María José; López-Amo Sáinz, Manuel; Ingeniaritza Elektrikoa eta Elektronikoa; Institute of Smart Cities - ISC; Ingeniería Eléctrica y Electrónica
This work presents an experimental demonstration of a scheme based on an internally modulated fiber ring laser for high-sensitivity temperature sensing. The attained temperature resolution has been as low as ± 2pm even when a commercial FBG with a sensitivity of 10 pm/°C was used. Thus, a fivefold improvement in the temperature sensor resolution can be achieved when compared to a simple FBG interrogation scheme. In addition to this, the measuring range could be selected only by changing the frequency modulation of the fiber ring laser. This technology also allows to triple the photodiode bandwidth unambiguously when temperature or strain measurements are carried out, which is a remarkable achievement in term of cost reduction.
Open Access
Programmable retiming of an optical clock signal using the temporal Talbot effect
(IEEE, 2019) Tainta Ausejo, Santiago; Erro Betrán, María José; Garde Alduncin, María José; Muriel, M. A.; Ingeniería Eléctrica, Electrónica y de Comunicación; Ingeniaritza Elektrikoa, Elektronikoaren eta Telekomunikazio Ingeniaritzaren
By using a Fourier processor based on the temporal Talbot effect and the properties of the Discrete Fourier Transform, we propose a scheme that adds an adjustable delay to a train of pulses while simultaneously preserving the clock recovery property of the Talbot effect. The obtained delay can be easily tuned by modifying only the electrical signal applied to an electro-optic modulator. Experimental results prove the validity of the proposal with a fine correspondence between the desired and measured delays all over a complete period of the signal.
Open Access
Optimized pattern design of a light guide using 2D ray-tracing simulation
(SPIE, 2023) Medrano Gurrea, Mario; Jiménez Martínez, Unai; Tainta Ausejo, Santiago; Erro Betrán, María José; Arnedo Gil, Israel; Beato López, Juan Jesús; Izura, J.; Zabala, Silvia; Institute of Smart Cities - ISC
We propose the use of a simplified model for the analysis of the scattering elements used in edge-lit systems. By modelling their behaviour as lambertian light sources whose properties depend on the size and geometry of the scatterer and LGP, it is possible to simulate the illuminance map of the edge-lit structure using only 2D ray-traced simulation. This reduces the computational complexity in the optimisation process used to calculate the scatterers distribution to achieve maximum uniformity in light extraction. The results obtained by comparison between the proposed algorithm and a commercial software demonstrate the validity of the proposal.