El grup de recerca treballa en dues temàtiques principals:
- L'estudi de fenòmens òptics lineals i no lineals en cristalls fotònics i microcavitats.
- L'estudi de la dinàmica espaciotemporal de sistemes no lineals, sobretot de làsers i sistemes òptics en general.

http://futur.upc.edu/DONLL

The research group works on two main topics: linear and nonlinear optical phenomena in photonic crystals and microcavities, and the spatiotemporal dynamics of nonlinear systems, in particular lasers and optical systems.

http://futur.upc.edu/DONLL

The research group works on two main topics: linear and nonlinear optical phenomena in photonic crystals and microcavities, and the spatiotemporal dynamics of nonlinear systems, in particular lasers and optical systems.

http://futur.upc.edu/DONLL

Recent Submissions

  • Uncovering temporal regularity in atmospheric dynamics through Hilbert phase analysis 

    Zappalà, Dario A.; Barreiro Parrillo, Marcelo; Masoller Alonso, Cristina (Institute of Physics (IOP), 2019-05-03)
    Article
    Open Access
    Uncovering meaningful regularities in complex oscillatory signals is a challenging problem with applications across a wide range of disciplines.Here, we present a novel approach, based on the Hilbert transform (HT).We show ...
  • Topological data analysis of high resolution diabetic retinopathy images 

    Garside, Kathryn; Henderson, Robin; Makarenko, Irina; Masoller Alonso, Cristina (Public Library of Science (PLOS), 2019-05-24)
    Article
    Open Access
    Diabetic retinopathy is a complication of diabetes that produces changes in the blood vessel structure in the retina, which can cause severe vision problems and even blindness. In this paper, we demonstrate that by identifying ...
  • Fully Noncontact Hybrid NDT for 3D Defect Reconstruction Using SAFT Algorithm and 2D Apodization Window 

    Mohamed Selim, Hossameldin; Trull Silvestre, José Francisco; Delgado Prieto, Miquel; Pico Vila, Rubén; Romeral Martínez, José Luis; Cojocaru, Crina (Multidisciplinary Digital Publishing Institute (MDPI), 2019-05-08)
    Article
    Open Access
    Nondestructive testing of metallic objects that may contain embedded defects of different sizes is an important application in many industrial branches for quality control. Most of these techniques allow defect detection ...
  • Stabilization of Broad Area Semiconductor Laser Sources 

    Medina Pardell, Judith; Ahmed, W. W.; Kumar, Shubham; Botey Cumella, Muriel; Herrero Simon, Ramon; Staliunas, Kestutis (Institute of Electrical and Electronics Engineers (IEEE), 2018)
    Conference report
    Open Access
    We numerically proof the stabilization of broad area semiconductor laser sources by introducing simultaneous in-phase two-dimensional modulations on the refractive index and on the pump (gain). We also examine the interplay ...
  • Stabilization of Broad Area Semiconductor Amplifiers and Lasers by Double Modulation of Pump and Refractive Index 

    Ahmed, W. W.; Kumar, Shubham; Medina Pardell, Judith; Botey Cumella, Muriel; Herrero Simon, Ramon; Staliunas, Kestutis (Institute of Electrical and Electronics Engineers (IEEE), 2018)
    Conference report
    Restricted access - publisher's policy
    Broad Area Semiconductor Amplifiers and Lasers display instability of the homogeneous state typically related with self-focusing nonlinearities, inducing multi-transverse mode operation and filamentation that deteriorates ...
  • Dissipation Induced Modulation Instability: New Applications for Frequency Combs and Pulses Generation 

    Perego, A.M.; Turitsyn, S.K.; Staliunas, Kestutis
    Conference report
    Restricted access - publisher's policy
    We present a new technique based on a dissipation induced modulation instability, caused by unbalanced spectral dissipation for signal and idler waves, with applications in amplifiers and parametric oscillators but especially ...
  • Assessing diversity in multiplex networks 

    Carpi, Laura C.; Schieber, Tiabo A.; Pardalos, Panos M.; Marfany Nadal, Gemma; Masoller Alonso, Cristina; Díaz Guilera, Albert; Ravetti, Martin G. (Nature, 2019-03-14)
    Article
    Open Access
    Diversity, understood as the variety of different elements or configurations that an extensive system has, is a crucial property that allows maintaining the system’s functionality in a changing environment, where failures, ...
  • Speckle reduction in double-pass retinal images 

    Halpaap Halpaap, Herbert Donatus; García Guerra, Carlos Enrique; Vilaseca Ricart, Meritxell; Masoller Alonso, Cristina (Nature, 2019-03-14)
    Article
    Open Access
  • All-solid-state VUV frequency comb at 160 nm using high-harmonic generation in nonlinear femtosecond enhancement cavity 

    Seres, Jozsef; Seres, Enikoe; Serrat Jurado, Carles; Young, E. C.; Speck, J.S.; Schumm, T. (2019-02-21)
    Article
    Open Access
    We realized a solid-state-based vacuum ultraviolet frequency comb by harmonics generation in an external enhancement cavity. Optical conversions were so far reported by only using gaseous media. We present a theory that ...
  • Quantifying the degree of locking in weakly forced stochastic systems 

    Tiana Alsina, Jordi; Quintero Quiroz, Carlos Alberto; Torrent Serra, Maria del Carmen; Masoller Alonso, Cristina (American Institute of Physics (AIP), 2019-02-12)
    Article
    Open Access
    Controlling an stochastic nonlinear system with a small amplitude signal is a fundamental problem with many practical applications. Quantifying locking is challenging, and current methods, such as spectral or correlation ...
  • Unsupervised feature extraction of anterior chamber OCT images for ordering and classification 

    Amil Marletti, Pablo; González, Laura; Arrondo Murillo, Elena; Salinas Almela, Cecilia; Güell, José Luis; Masoller Alonso, Cristina; Parlitz, Ulrich (Nature, 2019-02-04)
    Article
    Open Access
    We propose an image processing method for ordering anterior chamber optical coherence tomography (OCT) images in a fully unsupervised manner. The method consists of three steps: Firstly we preprocess the images (filtering ...
  • Laser Ultrasound Inspection Based on Wavelet Transform and Data Clustering for Defect Estimation in Metallic Samples 

    Mohamed Selim, Hossameldin; Delgado Prieto, Miquel; Trull Silvestre, José Francisco; Romeral Martínez, José Luis; Cojocaru, Crina (Multidisciplinary Digital Publishing Institute (MDPI), 2019-01-30)
    Article
    Open Access
    Laser-generated ultrasound is a modern non-destructive testing technique. It has been investigated over recent years as an alternative to classical ultrasonic methods, mainly in industrial maintenance and quality control ...

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