High-power ultrafast InN-based all-fiber laser

4th Ultrafast Science & Technology Spain 2022 (USTS 2022), 16-18 Nov. 2022, Málaga, Spain.Tipo de participación: Participativo - Póster; Ámbito geográfico: Internacional; Con comité de admisión ext.: Si; Forma de contribución: Artículo científico; Entidad organizadora: Real Sociedad Española de FísicaUltrafast fiber lasers can be applied to a wide variety of applications, including laser micromachining, material processing, surgery, and electronics. Ultrashort pulses can be generated in an inexpensive and simple manner using mode-locked lasers, which have demonstrated greater characteristics, including efficiency, stability, and ease of implementation

Novel InN-based SESAMs with ultra-short time response

2019 Conference on Lasers and Electro-Optics Europe and European Quantum Electronics Conference (CLEO/Europe-EQEC), 23–27 June 2019, Munich, Germany.Tipo de participación: Participativo - Póster, Entidad organizadora: Optical Society of America, Forma de contribución: Artículo científico.Semiconductor saturable absorbers are becoming a matter of interest since they are keystone elements of pulsed lasers, leading to ultrashort pulses with high peak intensities and wide optical spectra. This kind of ultrafast lasers are empowering new applications in the fields of optical telecommunications and nonlinear optics. In order to improve the radiation source with regard to pulse energy and temporal duration, new saturable absorbers are still under development

Estudio de la reacción jurídica ante el auge de la xenofobia en las redes. Análisis del caso alemán, francés y español

El presente trabajo tiene como objetivo ofrecer una imagen clara sobre la respuesta jurídica de tres países europeos -Alemania, Francia y España- y de la comunidad internacional ante el incremento de la difusión de contenidos xenófobos a través de las redes

Numerical evaluation of spectral coverage and spectral resolution in coherent Raman scattering spectroscopy using a broadband fiber laser source

We theoretically investigate the feasibility of using a fiber laser source for high resolution and broadband coherent Raman scattering (CRS) spectroscopy/ imaging employing spectral focusing technique. To accomplish this task, we have developed a simulation tool where the laser pulse parameters can be imported directly from any pulse propagation software using split-step Fourier method to evaluate the spectral resolution and spectral coverage of CRS spectroscopy. Thus, the simulation tool can accommodate optical pulses of arbitrary shape and central wavelength, being also a user-friendly and versatile open-source software. We validate the numerical simulation tool by comparing its results with published theoretical and experimental data. We then use the tool to study the feasibility of using an all-fiber laser source for high resolution CRS spectroscopy in both the C-H window and the fingerprint region. This tool has a broad scope of applications in multiple fields where CRS spectroscopy is useful such as biomedicine, materials characterization, and biological imaging.Comunidad de MadridAgencia Estatal de Investigació

Analysis of spectral coverage and resolution performance in spectral focusing CARS spectroscopy

Conference on Lasers and Electro-Optics / Pacific Rim 2022, 31 August–5 September 2022, Sapporo Japan.Tipo evento: Congreso, Ámbito geográfico: Internacional no UE, Tipo de participación: Participativo - Ponencia oral (comunicación oral), Intervención por: Acceso por inscripción libre, Ciudad de celebración: Híbrido-Online, Entidad organizadora: Optical Society of America (OSA), Publicación en acta congreso: Si Con comité de admisión ext.: Si, Forma de contribución: Artículo científico.An open-code simulation tool for spectral focusing Coherent Anti-Stokes Raman Scattering (SF-CARS) spectroscopy has been developed for the analysis of spectral coverage and resolution performance. The main limitation has been found due to high-order dispersion and nonlinearities in laser source

High energy ultrafast all-fiber laser based on InN-GRIN saturable absorber

OSA Advanced Photonics Congress 2021, 26-30 July 2021, Montreal, Canadá (online).Ámbito geográfico: Internacional no UE; Tipo de participación: Participativo - Ponencia oral (comunicación oral); Entidad organizadora: Optical Society of America; Forma de contribución: Artículo científico.A simple, solid, cost-effective GRIN-to-fiber coupling system has been developed by incorporating an InN-based SESAM in a polarization independent ring-cavity EDFL. The assembly delivers stable high-power (70 kW) ultrashort pulses (90 fs) at the laser output

Pilot study of a psychotherapeutic intervention for reducing guilt feelings in highly distressed dementia family caregivers (innovative practice)

Many caregivers of people with dementia experience guilt but few interventions have been deigned to help them with these feelings. This study aimed to describe a psychological intervention specifically developed for decreasing caregivers´ guilt. The sample was composed of four caregivers, individually interviewed before and after the intervention. The intervention consisted of eight group-based sessions and was based on cognitive-behavioral, acceptance and self-compassion techniques. Three participants reported clinically reliable change in guilt. Clinically significant changes were also observed in their levels of anxiety and depression. The results suggest that carers might benefit from interventions designed to reduce their feelings of guiltThe authors disclosed receipt of the following financial support for the research, authorship, and/or publication of this article: The study was supported by the Spanish Ministry of Economy and Competitiveness (PSI2015-65152-C2-1-R

Family dynamics in dementia caregiving: development and validation of the interpersonal triggers of guilt in dementia caregiving questionnaire (ITGDCQ)

The objective was to develop the Interpersonal Triggers of Guilt in Dementia CaregivingQuestionnaire (ITGDCQ). An emotion frequently experienced by caregivers is guilt. Howe-ver, the studies analyzing potential factors that generate guilt are scarce. Guilt may begenerated through interpersonal interactions. A total of 201 dementia caregivers were eva-luated for frequency of leisure, guilt, anxiety, depression, and a pool of items measuring thefrequency, and guilt was derived from different behaviors performed by the care recipient(ITGDCQ-CR) and other relatives (ITGDCQ-OR). Exploratory factor analysis of theITGDCQ-CR showed a two-factor solution, explaining 56.24% of the variance. TheITGDCQ-OR subscale also showed two factors, explaining 63.24% of the variance. All thefactors had acceptable to good reliability indexes. Positive associations were found betweenboth subscales and depression, anxiety, guilt, and stress associated with CR’s behavioralproblems. ITGDCQ-CR was negatively correlated with frequency of leisure. The interperso-nal dynamics assessed with the ITGDCQ generated other emotions such as anger or sad-ness. Through structural equation modeling, 28% of the variance of caregivers’ distresswas explained by the assessed variables, including a significant contribution of the inter-personal dynamics assessed with the ITGDCQ. The results provide preliminary supportfor the use of the ITGDCQ as a valid and reliable measure of care recipients’ or other relati-ves’ factors that trigger or facilitate the experience of guilt in the caregivers. The associationbetween these factors and caregiver distress suggests potential clinical implications for the findingsThe study was supported by the Spanish Ministry of Economy and Competitiveness (grants PSI2015-65152-C2-1-R and PSI2015-65152-C2-2-R

The Effectiveness of Advanced Practice Nurses with Respect to Complex Chronic Wounds in the Management of Venous Ulcers

This study aims to evaluate the effectiveness of advanced practice nurses with respect to complex chronic wounds (APN-CCWs) in the care of patients with venous ulcers. A multicentric, quasi-experimental pre-post study was conducted without a control group in the sanitary management areas where the APN-CCW program is being piloted. The intervention consisted of a mass training of clinical nurses from the participating districts on the proper management of injuries and the use of compression therapy. The data were collected through a specifically constructed questionnaire with questions regarding descriptive variables of injuries and their treatment. A total of 643 professionals responded (response rate of 89.1%), attending to a total population of 707,814 inhabitants. An increase in multilayer bandage use by 15.67%, an increase in elastic bandage use by 13.24%, and a significant decrease in the referral of patients to consultation with hospital specialists was achieved, from 21.08% to 12.34%. The number of patients referred to the APNs was 13.25%, which implied a resolution rate of 94.08% of their injuries. In conclusion, the coordination by the APN-CCWs in patients with venous ulcers was effective in improving the continuity of care, in the optimization of resources, and in their care role

Effect of the residual doping on the performance of InN epilayers as saturable absorbers for ultrafast lasers at 1.55µm

We report on the improvement of performance of InN-based saturable absorbers in fiber lasers operating at 1.55 mum by reducing the residual doping, due to the lower Burstein-Moss effect. The improved tuning of the band-to-band transition with respect to the operation wavelength leads to an enhancement of nonlinear optical effects, resulting in 30 % of modulation depth. We introduce the development of an ultrafast mode-locked fiber laser using an improved InN-based saturable absorber that incorporates a buffer layer between the active layer and the substrate. The laser delivers output pulses with a temporal width of 220 fs, a repetition rate of 5.25 MHz, and high-pulse energy of 5.8 nJ.Ministerio de Economía, Industria y CompetitividadMinisterio de Ciencia, Innovación y UniversidadesComunidad de Madri