Archivo

Archivo para la categoría ‘International’ XML Feed

New paper in JJAP demonstrating the parallel generation of different vector beams


jjapWe published a new paper in Japanese Journal of Applied Physics entitled Parallel generation of multiple first-order vector beams with a polarization grating and a q-plate device.

In this work we demonstrated the parallel generation of multiple vector beams by combining a polarization diffraction grating with a q-plate element.

This work was made with our friends at San Diego State University (US), and in collaboration with our colleagues at the Development Division of Citizen Holdings Co (Japan).


Miércoles, 9 de noviembre de 2016 Sin comentarios

TecnOpto selected as finalist of the Edmund Optics 2016 Educational Award


edu-16-sheildTecnOpto was selected as a finalist of the 2016 Educational Award of the company Edmund Optics.

The selection was made on the basis of a proposed project of building a programmable optical microscope with different Fourier transform filtering operations performed in real time from a computer with a LCoS display. This way we are able to reproduce classical and novel microscopy techniques without moving elements in the optical system.

The complete list of winners and finalists can be found in: link

 


Categories: Education, International, Outreach Tags:

Lunes, 7 de noviembre de 2016 Sin comentarios

Ignacio Moreno attends the 6th Workshop LCP in Ljubljana


lcp-ljbljanaIgnacio Moreno attended the 6th International Workshop on Liquid Crystals for Photonics – WLCP2016, that was held in Ljubljana (Slovenia) from September 14th to 16th.

In this workshop he gave an invited talk entitled “Liquid-crystal spatial light modulator based optical ac¡architecture for the full polarization modulation – Application to encode optical polarization devices”.

The LCP workshop is always particularly friendly to attend, after our organization in 2010 in Elche.

The picture shows Ignacio with our friends Juan Campos and Angel Lizana, from Autonomous University of Barcelona, who also attended the conference.

 


Categories: Conferences, International Tags:

Viernes, 30 de septiembre de 2016 Sin comentarios

Asticio Vargas visits TecnOPTO Lab


Asticio VargasIn June 2016 we received the visit of our friend Dr. Asticio Vargas, from the Department of Physical Sciences, at Universidad de La Frontera, in Temuco, Chile.

Asticio stayed for three weeks in our lab, where we have been working hard on different projects related to Solc filters and polarization.

The picture shows from right to left Asticio, with Ignacio, and two of the current PhD students, Abdelghafor Messaddi, from Algeria, and  Aaron Cofré, also from Chile.


Categories: Collaborators, International Tags:

Martes, 28 de junio de 2016 Sin comentarios

New paper in Optics Letters about the production of non-diffracting vector beams


Vector beamsWe published a new paper in Optics Letters, entitled Nondiffracting vector beams where the charge and the polarization state vary with propagation distance. The paper appeared published in the OL issue of May 2016.

In this work we  generate nondiffracting vector beams where the charge and the polarization state vary with the propagation distance. We use reflective geometry where a parallel-aligned spatial light modulator is used to spatially modulate two orthogonal linear polarizations. We encode spiral phases with equal charge but with opposite signs onto the two polarization directions to encode a vector beam and add two axicon phases. Both the charge and the phase shift between the two axicons can be varied along the focus line.

This work has been done in collaboration with our friends at San Diego State University, and was designed during the recent visit of Ignacio Moreno to SDSU in February 2016.


Categories: International, Publications Tags:

Miércoles, 18 de mayo de 2016 Sin comentarios

New paper in Optical Engineering, with a q-plate operating at the 1550 nm telecom wavelength


1550 nm peakWe published a new paper in Optical Engineering Letters, entitled Generation of vector beams at 1550 nm telecommunications wavelength using a segmented q-plate. The paper appeared published in the third issue of OE journal in 2016.

In this work we present the use of a q-plate device operating at the 1550 nm telecommunications wavelength. A prototype liquid-crystal device from Citizen Holdings Co. is demonstrated to be useful for the generation of vector beams and orbital angular momentum transfer at this important wavelength.

The device was developed for a visible wavelength, but we show here that it can be applied also for the 1550 nm wavelength, where is of interest to apply such devices to multiplex data with OAM channels.

This work was initiated during the stay of María M. Sanchez-López and Ignacio Moreno at SDSU during Summer 2015.


Categories: International, Publications Tags:

Sábado, 9 de abril de 2016 Sin comentarios

Ignacio Moreno presents an invited conference at SPIE Photonics Europe 2016


epeIgnacio Moreno presents an invited communication at the meeting SPIE Photonics Europe held in Brussels in April 2016.

The communication is entitled “Production of arbitrary polarized light beams with a liquid crystal spatial modulator”, and it was presented within the session Optical Micro- and Nanometrology. This communication reviews our recent advances in the design of polarization diffractive optical elements encoded onto a spatial light modulador system.


Categories: Conferences, International, Publications Tags:

Sábado, 9 de abril de 2016 Sin comentarios

The paper “Nondiffracting Bessel beams with polarization state that varies with propagation distance” selected by OSA for SPOTLIGHTS ON OPTICS


SpolightThe paper Nondiffracting Bessel beams with polarization state that varies with propagation distance that we published in Optics Letters last year has been selected in the section SPOTLIGHT ON OPTICS by OSA – the Optical Society of America, specifically in the section devoted to Optical Design and Instrumentation.

This section of the OSA website selects highlighted articles from OSA journals. Our paper in Optics Letters has been receiving considerable impact, since it was for three consecutive months in the TOP10 downloaded papers in the journal.

 


Categories: International, Outreach, Publications Tags:

Jueves, 7 de abril de 2016 Sin comentarios

New paper in Optics Letters with q-plates encoded onto a SLM to produce integer and fractional vector beams


ThumbnailWe published a new paper in Optics Letters entitled Generation of integer and fractional vector beams with q-plates encoded onto a spatial light modulator. The paper appeared published in the sixth issue of OL in 2016.

In this paper we generated programmable vector beams with arbitrary -plates encoded using a spatial light modulator system. Consequently, we have been able to analyze new and exotic -plate designs without the difficulty of fabricating individual plates. For instance, we showed experimental results for positive and negative integer and new fractional vector beam values.

For instance, the picture shows a fractional vector beam where the polarization changes linearly in three sectors along the polar coordinate in the plane traversal to the beam.

This work has been done during the stay of María M. Sanchez-López and Ignacio Moreno at SDSU during Summer 2015.


Martes, 22 de marzo de 2016 Sin comentarios

Ignacio Moreno visits the Department of Physics at SDSU


With Jeff and NobuyukiIgnacio Moreno made a short one week visit to our friends at San Diego State University (SDSU) in February 2016. During this short visit he could discuss the collaboration continuation with Prof. Jeffrey Davis and his team at the Department of Physics.

We also had the opportunity to have a visit from Prof. Nobuyuki Hashimoto, and Ayano Tanabe, from the Development Division of Citizen Holdings Co., Ltd, in Saitama, Japan. Prof. Hashimoto provided us with a prototype q-plate liquid crystal device that we have been using on our last common works on the generation and manipulation of vector beams. The picture shows us, Jeff, Nobuyuki and Ignacio, at the SDSU campus.


Categories: Collaborators, International Tags:

Lunes, 21 de marzo de 2016 Sin comentarios