Browsing by Subject "Optics"

Now showing items 1-20 of 71

    • Asymmetric soliton mobility in competing linear-nonlinear parity-time-symmetric lattices 

      Kartashov, Yaroslav V.; Vysloukh, Victor A.; Torner Sabata, Lluís (2016-09-15)
      Article
      Restricted access - publisher's policy
      We address the transverse mobility of spatial solitons in competing parity-time-symmetric linear and nonlinear lattices. The competition between out-of-phase linear and nonlinear lattices results in a drastic mobility ...

    • Attosecond pulse shaping using partial phase matching 

      Austin, Dane R.; Biegert, Jens (IOP, 2014-11-04)
      Article
      Open Access

    • Automatic compensation of polarisation drifts in an optical fibre 

      Cichy Cusi, Simon (Universitat Politècnica de Catalunya, 2020-06)
      Bachelor thesis
      Open Access
      In days where Science Fiction uses the word ?Quantum? to justify any weird phenomena, we are actually on the edge of the Second Quantum Revolution. The ability to harness the potential of the quantum state of single particles ...

    • Binocular open-view system to perform estimations of aberrations and scattering in the human eye 

      García Guerra, Carlos Enrique; Aldaba Arévalo, Mikel; Pujol Ramo, Jaume; Arjona Carbonell, Mª Montserrat (2015-11-10)
      Article
      Open Access
      We present a system that integrates a double-pass (DP) instrument and a Hartmann-Shack (HS) wavefront sensor to provide information not only on aberrations, but also on scattering occurring in the human eye. A binocular ...

    • Brightness enhancement in Non-Hermintian VCSELs 

      Waseem Ahmed, Waqas; Herrero Simon, Ramon; Botey Cumella, Muriel; Staliunas, Kestutis (Optical Society of American (OSA), 2019)
      Conference report
      Restricted access - publisher's policy
      Vertical Cavity Surface Emitting lasers (VCSELs) are compact and efficient light sources useful for a variety of applications. However, due to lack of a transverse mode control mechanism, such lasers suffer from poor spatial ...

    • Calibration of an optical probe 

      Rodríguez Maiztegui, Maitane (Universitat Politècnica de Catalunya / Institut National Polytechnique de Grenoble, 2009)
      Master thesis (pre-Bologna period)
      Restricted access - author's decision
      The aim of the experiment is to calibrate a monofiber optical probe, used in two phase gas-liquid flow, to a speed of 40 m/s. To measure the bubble velocity, the optical probe requires calibration. This procedure consists ...

    • Canvis relatius en la refracció perifèrica en escolars. 

      Alcoverro Alcázar, Sandra (Universitat Politècnica de Catalunya, 2015-06-29)
      Bachelor thesis
      Open Access
      Diversos estudis han demostrat que la retina perifèrica juga un paper important en la determinació del creixement de l’ull, que té un efecte sobre el creixement de la longitud axial, i pot participar en el procés ...

    • Canvis relatius en la refracció perifèrica en infants preescolars. 

      Salva Angles, Cristina (Universitat Politècnica de Catalunya, 2015-06-29)
      Bachelor thesis
      Open Access
      Nombrosos estudis han demostrat que el desenvolupament de l’error refractiu és un procés manipulable, fins i tot un cop finalitzat el procés d’emmetropització. S’ha suggerit que quan es fa coincidir una imatge enfocada ...

    • Comparison of OFDM with single carrier in high-data rate optical communication systems 

      Diaz Souto, Alberto (Universitat Politècnica de Catalunya, 2011-12-23)
      Master thesis (pre-Bologna period)
      Open Access
      English: Analysis of Orthogonal FDM modulation for long-haul optical communications, and validation of its performances over conventional transmission.

    • Conformational changes in matrix-isolated 6-methoxyindole: Effects of the thermal and infrared light excitations 

      Lopes Jesus, A. J.; Reva, I.; Araujo-Andrade, Cuauhtemoc; Fausto, R. (AIP, 2016-03-25)
      Article
      Open Access
      Conformational changes induced thermally or upon infrared excitation of matrix-isolated 6-methoxyindole were investigated. Narrowband near-infrared excitation of the first overtone of the N–H stretching vibration of each ...

    • Coupling plasmons and dyakonons 

      Takayama, Osamu; Artigas García, David; Torner Sabata, Lluís (2012-06-01)
      Article
      Restricted access - publisher's policy
      We study the coupling of plasmons and Dyakonov surface waves propagating at the interfaces between isotropic-birefringent-metal layered structures. Efficient coupling is shown to occur with a proper choice of the crystal ...

    • Creació i planificació estratègica d'una òptica en època de canvis 

      Pallarès Mestre, Sílvia (Universitat Politècnica de Catalunya, 2014-12-12)
      Master thesis
      Open Access
      En aquest Treball de Final de Màster, es vol portar a terme un pla de negoci per implantar una òptica en un poble costaner de Catalunya (Calafell). Explicarem i desenvoluparem tots els procediments i estratègies per convertir ...

    • Cyclic concentrator, carpet cloaks and fisheye lens via transformation plasmonics 

      Alaoui, M.; Rustomji, K.; Chang, T. M.; Tayeb, G.; Sabouroux, P.; Quidant, R.; Enoch, S.; Guenneau, S.; Abdeddaim, R. (IOP, 2016-04-01)
      Article
      Open Access
      We first review basic equations of plasmonics in anisotropic media. We recall the origin of Maxwell’s gradient index fisheye lens. We then apply tools of transformation optics to the design of a cyclic concentrator and ...

    • Design of adaptative digital filters for phase extraction in complex fringe patterns obtained using the Ronchi test 

      Caum Aregay, Jesús; Arasa Marti, Jose; Royo Royo, Santiago; Ares Rodríguez, Miguel (2012-02-15)
      Article
      Open Access

    • Design, implementation and test of a routine Light Sheet fluorescence microscope 

      Escobet Montalbán, Adrià (Universitat Politècnica de Catalunya, 2015-06)
      Bachelor thesis
      Open Access
      Microscopy has revealed an astonishing new world that was previously invisible to our eyes. Unfortunately, we still have very little knowledge of how life actually works, and for that reason new powerful microscopy techniques ...

    • Diffuse optics with time-pulsed, gated point and ring sources 

      Mateos Estévez, Nicolás (Universitat Politècnica de Catalunya, 2015-06-29)
      Bachelor thesis
      Restricted access - confidentiality agreement

    • Difracción: el tamaño importa 

      Marzoa Domínguez, Antonio (2021-03-01)
      Article
      Open Access
      ¿Nunca te has sorprendido en la autopista por la forma de los haces de luz de los faros de carretera? ¿O bien porque al tomar fotografías de paisajes dónde aparece el Sol, aparecen haces de luz como hilillos que emergen ...

    • Disseny d'un canal de despolarització a 532 nm per al lidar d'EARLINET de la UPC 

      Vidal Calvo, Eric (Universitat Politècnica de Catalunya, 2013-03-14)
      Master thesis (pre-Bologna period)
      Open Access
      [ANGLÈS] Design of a depolarization channel at the wavelength of 532 nm for the UPC EARLINET lidar

    • Disseny de lents progressives 

      Casanellas Peñalver, Glòria (Universitat Politècnica de Catalunya, 2014-02)
      Master thesis
      Restricted access - author's decision
      Presbyopia starts to show up at the age of 40. The lens of the eye loses its flexibility to the point where we can no longer accommodate clearly in near vision. Progression-addition lenses correct the lack of accommodation ...

    • Dynamic versus Anderson wave-packet localization 

      Borovkova, Olga V.; Lobanov, Valery E.; Kartashov, Yaroslav V.; Vysloukh, Victor A.; Torner Sabata, Lluís (2015-06-18)
      Article
      Open Access
      We address the interplay between two fundamentally different wave-packet localization mechanisms, namely, resonant dynamic localization due to collapse of quasienergy bands in periodic media and disorder-induced Anderson ...