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New paper in Optics & Lasers in Engineering with a geometric phase lens based system to analyze vector beams

VortexWe published a new paper in Optics & Lasers in Engineering entitled Geometrical-phase lens based optical system for the spin-splitting of vector beams

In this work we combine a geometric phase lens and a telescope system to produce an optical system with two polarization controlled real foci with equal magnification. And we apply it to characterize vortex beams and vector beams, splitting longitudinally the circular polarization components and focusing them into different axial planes.

This work was develop din collaboration with our friends Asticio Vargas and Fabián Torres-Ruiz, from Universidad de La Frontera, Temuco (Chile). And it is part of the PhD Thesis of Aarón Cofré.

Sábado, 14 de julio de 2018 Sin comentarios

Santiago López presents his Final Degree Project for Telecommunications Degree on a system to generate phase-only holograms with new high resolution displays

SantiagoOn July 9th, 2018, Santiago López, student of the Grade of Telecommunications Engineering, defended his final degree project entitled Caracterización de moduladores de cristal líquido para la generación de hologramas de fase y su optimización.

In this work, Santiago developed a characterization of the phase properties of some new displays acquired at the TecnOPTO Lab, and developed new methods and designs to generate phase-only holograms with them.

The project, supervised by Ignacio Moreno, received the maximum qualification

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Martes, 10 de julio de 2018 Sin comentarios

New paper on Optics Letters with a design for an achromatic retarder system with tunable retardance


We published a new paper in Optics Letters entitled Achromatic linear retarder with tunable retardance.

In this work we present a universal design and proof-of-concept of a tunable linear retarder of uniform wavelength response in a broad spectral range. It consists of two half-wave retarders (HWR) between two quarter-wave retarders (QWRs), where the uniform retardance can be tuned continuously by simply rotating one of the HWRs. A proof-of-concept of this design is built by using commercially available Fresnel rhomb retarders that provide retardation with almost wavelength uniformity in the visible and near infrared from 450 to 1550 nm. The system is experimentally demonstrated to control the state of polarization of a super-continuum laser.

The work has been developed in collaboration with Asticio Vargas, from Universidad de la Frontera, Chile. And it is part of the PhD thesis of Abdelghafour Messaadi.

Sábado, 7 de julio de 2018 Sin comentarios

New paper in Optics & Laser Technology on the use of commercial q-plates at different wavelengths

S plateA new paper in the journal Optics & Laser Technology entitled Spectral performance of a zero-order liquid-crystal polymer commercial q-plate for the generation of vector beams at different wavelengths.

It deals with the use of liquid-crystal polymer q-plates operated at different wavelengths. We show how a broadband spectral characterization allows identifying the wavelengths with retardance values relevant for vector beam generation (ππ/2, and 3π/2). The wavelength is then used as a tuning parameter to change the device performance from the standard half-wave q-plate to a positive or a negative quarter-wave q-plate.

We present a simple procedure to derive the polarization distribution of the generated vector beams, and show that they can produce hybrid vector beams when operated at non-design wavelenths. Therefore, these results could extend the use of commercial q-plates for multicolour vector beam applications.

This work has been done in collaboration with Prof. Jeffrey A. Davis and Isaiah Abella, from San Diego State University.


Miércoles, 25 de abril de 2018 Sin comentarios

New paper in Optics & Lasers in Engineering with a self-calibration technique for a LCoS display

OLEA new paper published in Optics & Lasers in Engineering presents an experimental method to calibrate a liquid crystal on silicon (LCoS) display by using split-lens configurations displayed on the device. The split-lens directly generates an interference pattern from which the phase modulation is calculated. Additionally, a micro-lens array is displayed on the LCoS, within the same experimental set-up, to implement a Shack-Hartmann wavefront sensor and retrieve the display surface deformation.

This work is entitled LCoS display phase self-calibration method based on diffractive lens schemes, and has been developed by our collaborators at Universitat Autònoma de Barcelona, with the participation of Ignacio Moreno.


Domingo, 18 de marzo de 2018 Sin comentarios

Asticio Vargas & Fabian Torres from UFRO visit TecnOPTO-UMH

Visita UFROsOur friends Asticio Vargas and Fabián Torres, from Universidad de La Frontera (UFRO) in Temuco, Chile, visited TecnOPTO-UMH lab in January 2018.

For two weeks we have been able to work together and continue our fruitful collaboration and develop common research projects. The Spanish-Chilean connection continues.


Jueves, 1 de febrero de 2018 Sin comentarios

New paper in Journal of Biophotonics about imaging biological tissues based on the indices of polarimetric purity

IPPsWe participated in a new paper published in Journal of Biophotonics entitled Polarimetric imaging of biological tissues based on the indices of polarimetric purity.

This work has been developed by our friends at Universitat Autònoma de Barcelona in the frame of the common coordinated collaboration project.

In this work we use the indices of polarimetric purity (IPPs) for the inspection of biological tissues.

Compared with standard polarimetric images of biological samples, IPP-based images lead to larger image contrast of some biological structures and to a further physical interpretation of the depolarizing mechanisms inherent to the samples.


Jueves, 4 de enero de 2018 Sin comentarios

TecnOPTO granted with a PROMETEO project from Generalitat Valenciana

GVATecnOPTO has been granted with a PROMETEO project from Generalitat Valenciana. Link

The project, entitled Development of vectorial and polarimetric optical instrumentation, will be focused on the realization of advanced optical instruments for the generation, control and application of vector beams, and is leaded by María del Mar Sánchez-López.


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Sábado, 25 de noviembre de 2017 Sin comentarios

Ilice Photonics starts activities

261017-_constitucion_ilice_photonics_compressed.medianaIlice Photonics, a spin-off company promoted by Daniel Puerto with Ignacio Moreno, started its activities in October 2017.

The company is devoted to develop projects in Optics & Photonics, and it is located at the UMH Scientific Park. Link

The picture shows Daniel Puerto with Prof. Jesús Pastor, Rector  of UMH, Prof. Manuel Jordán, Vicerector for Research & Innovation, and Tonia Salinas, Director of the Scientific Park, after the constitution of the company.



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Domingo, 29 de octubre de 2017 Sin comentarios