
Eneko ArrospideUniversity of the Basque Country | UPV/EHU
Eneko Arrospide
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36
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Publications
Publications (36)
Raman scattering is the inelastic process where photons bounce off molecules, losing energy and becoming red-shifted. This weak effect is unique to each molecular species, making it an essential tool in, e.g., spectroscopy and label-free microscopy. The invention of the laser enabled a regime of stimulated Raman scattering (SRS), where the efficien...
Raman scattering is the inelastic process where photons bounce off molecules, losing energy and becoming red-shifted. This weak effect is unique to each molecular species, making it an essential tool in e.g. spectroscopy and label-free microscopy. The invention of the laser enabled a regime of stimulated Raman scattering (SRS), where the efficiency...
In this work we develop an experiment wherein the variation of the fringe
visibilities with wavelength provides insights into the geometry of various stellar sources or components.
The experiment is based on the Michelson stellar interferometer in which a filter wheel
has been inserted between a detecting camera and a telescope obscured by a double...
This paper employs the solution-doping technique for the fabrication of polymer optical fibers (POFs) doped with two perylene derivatives, Lumogen Yellow 083 and Lumogen Red 305, in different combinations. With the solution-doping technique is very easy to control the amount of dopant penetration into the core of non-doped uncladded fibers, allowin...
In this paper, we report the temperature effects on the luminescence of polymer optical fibers doped with Lumogen dyes (red and orange). Specifically, we have analyzed the intensity and the average wavelength of the spectra emitted by both fibers when they are heated from 30 °C to 90 °C. An almost full self–recovery of the signal in the fiber doped...
In this paper, we report on the fabrication of a dual-core microstructured polymer optical fiber (DC-MPOF). Experimental tests were carried out in order to measure its coupling efficiency and coupling length. For compari-son purposes, a theoretical analysis was made, and its results were in good agreement with those obtained exper-imentally, as a h...
In this paper we report on the theoretical analysis and fabrication of a dual-core microstructured polymer optical fiber (mPOF) and demonstrate how the coupling characteristics of a dual-core mPOF may be a key factor to assess the quality of the fabrication process. The coupling characteristics of this fiber have been tested and, for comparison pur...
A new approach of Fiber Enhanced Raman Spectroscopy (FERS) is described within this article based on the use of Hydrogel-Core microstructured Polymer Optical Fibers (HyC-mPOF). The incorporation of the hydrogel only on the core of the Hollow-Core microstructured Polymer Optical Fiber (HC-mPOF) enables to perform FERS measurements in a functionalize...
In this work, we detail two types of fabrication processes of four polymer optical fibers doped with lumogen dyes. The fiber preforms have been manufactured with two different methods: extrusion and casting. We have compared the performance of the two types of fibers as luminescent solar concentrators by calculating their optical efficiencies and c...
The performance of a precisely controlled drilling technique is critical in the fabrication process of microstructured polymer optical fibres. For the creation of a holey preform, adequate drilling bits with large length-to-diameter ratios provide the ability of machining preforms with complex structures and large lengths in a relatively short time...
This work reports the development and application of two liquid-core microstructured polymer optical fibers (LC-mPOF) with different microstructure sizes. They are used in a Fiber Enhanced Raman Spectroscopy (FERS) sensing platform, with the aim of detecting glucose in aqueous solutions in the clinically relevant range for sodium-glucose co-transpo...
This paper employs the solution-doping technique for the fabrication of active polymer optical fibers (POFs), in which the dopant molecules are directly incorporated into the core of non-doped uncladded fibers. Firstly, we characterize the insertion of a solution of rhodamine B and methanol into the core of the fiber samples at different temperatur...
The cover image, by Eneko Arrospide et al., is based on the Review Polymers beyond standard optical fibres ‐ fabrication of microstructured polymer optical fibres, DOI: 10.1002/pi.5602.
A highly sensitive fibre bundle-based reflective optical sensor has been designed and fabricated for Tip Clearance measurements in a turbine rig. The sensor offers high spatial and temporal resolution. The sensor probe consists of a single-mode transmitting fibre and two concentric rings of receiving multimode fibres that collect reflected light in...
This paper reports the overall fabrication process of microstructured polymer optical fibres (mPOFs). The mPOF fabrication involves a two‐step process: on the one hand, the design and creation of a preform containing a large‐scale version of the desired fibre and, on the other, the precise heating and drawing of the preform to the final fibre. The...
We report on a packaged interferometer built with strongly-coupled multi-core optical fiber (MCF) for vibration sensing. A miniature test mass (~0.01 g) induces cyclic bending to the MCF which results in periodic shifts of the interference pattern.
We report on a compact accelerometer built with strongly coupled multi-core optical fiber. The device was placed in cantilever position. An ultra-miniature seismic mass was used to tune the device sensitivity and operating frequency range.
In this work we show an optical fiber evanescent wave absorption probe for glucose detection in different physiological media. High selectivity is achieved by functionalizing the surface of an only-core poly(methyl methacrylate) (PMMA) polymer optical fiber with phenilboronic groups, and enhanced sensitivity by using a U-shaped geometry. Employing...
Four different dye-doped polymer optical fibers (POFs) have been fabricated following
a two-step fabrication process of preform extrusion and fiber drawing, using poly-(methyl methacrylate)
(PMMA) as hostmaterial and dye derivatives fromperylene and naphtalimide as active dopants. The side
illumination technique (SIT) has been employed in order to...
In contrast to conventional polymer optical fibres (POFs), single-mode microstructured POFs (SM mPOF) exhibit polarization properties that make them potentially interesting for their use in the design and development of polarimetric fibre optic systems. In spite of the theoretical six-fold symmetry of the microstructure that yields zero linear bire...
This paper provides an analysis of the emission properties of different polymer optical fibers doped with organic materials with the aim of investigate their performance as luminescent solar concentrators. We present a study of the light propagation along the fibers, together with the experimental measurements of two different efficiencies: side il...
This chapter describes the mechanical properties of POFs, such as Young's modulus, strain, stress, or strength, which result relevant in the performance of POFs, as well as in the aging and in the fabrication of new POF designs. All these physical properties vary drastically depending on the designed POF type, going from conventional step-index POF...
In this work the steps, followed for the fabrication of lumogen-orange-doped polymer optical fibres, are presented together with a spectral and temporal characterization of the emission properties of these doped POFs. This characterization includes a detailed study of the effects of the propagation distance and of the fluorescence life-times
Berry's phase is a quantum effect where every system transported adiabatically around a closed loop in momentum space suffers a topological phase change. The evidence of this effect at classical level has been explored analyzing the optical activity in a helically wound single-mode optical fiber. In this article we report for the first time this ge...
Multi-Core Plastic Optical Fibers (MCPOFs) are, in general, composed of plastic optical cores arranged in concentric rings around a central core. Due to this geometry, a new kind of misalignment appears when connecting these fibers: the rotational misalignment, which accounts for the coupling losses produced when the cross sections of two connected...
This article uses Theil's index to confirm the convergence of welfare effort in 21 developed countries. Taking advantage of the properties of this index, this article decomposes the dispersion of effort into its immediate determinants and thus illustrates that it is possible for there to be convergence in welfare effort but not in the intensity wit...
This paper demonstrates both the feasibility of long-period gratings (LPGs) written in microstructured polymer optical fibres (mPOFs) for detecting and measuring the strain rate and magnitude of engineering structures as well as its practical realization on a steel plate. The results of the experimental tests were validated and compared to a commer...