Now showing items 1-17 of 17

    • A new flexible ONU design for UDWDM-PON with coherent transceivers and smart activation process 

      Segarra Mullerat, Josep; Sales Zaragozá, Vicente; Prat Gomà, Josep Joan; Pous, R. (2014)
      Conference report
      Restricted access - publisher's policy
      We present a novel ONU architecture for coherent UDWDM-PON with randomly distributed ONU wavelengths. The ONU is built with one or two lasers exhibiting simple limited thermal tunability in a specific optical band, where ...
    • A super frequency-shifter: enhancing the capabilities of acousto-optic modulators 

      Salazar Serrano, Luis José (Universitat Politècnica de Catalunya, 2012-09-06)
      Master thesis
      Open Access
      [ANGLÈS] We put forward a new scheme to enhance the capabilities of currently available acousto-optic frequency shifters (AOFS) by making use of the idea of weak value amplification. The key result of our approach is that ...
    • Amplificación de pulsos con amplificadores ópticos semiconductores 

      Soneira Ferrando, M. José; González, J. F.; Ruiz Moreno, Sergio (Unión Científica Internacional de Radio (URSI), 1990)
      Conference report
      Open Access
    • C + L band extended reach amplified next generation access networks 

      Andre, P. S; Teixeira, A.L.J.; Girão, J.P.; Neto, B.; Rocha, A.M.; Reis, Catarina Isabel Ferreira Viveiros Tavares dos; Dionisio, R.P; Chatzi, Sotiria; Bonada Bo, Francesc; Lázaro Villa, José Antonio (2011-07)
      Article
      Restricted access - publisher's policy
      The feasibility of optical amplification solutions for extended reach next generation access networks in C + L bands is studied. Amplification schemes based on Raman fiber amplifier and their combination with remotely ...
    • Cost-effective transceiver based on an RSOA and a VCSEL for flexible uDWDM networks 

      Altabas, Jose Antonio; Izquierdo, David; Lázaro Villa, José Antonio; Garces, Ignacio (2016-05-15)
      Article
      Open Access
      A cost-effective transceiver for a 1-Gb/s full-duplex ultra-dense wavelength division multiplexing optical link is proposed for flexible metro-access and 5G networks. The transceiver is based on a vertical cavity surface ...
    • Design and optimization of radio-over-fiber links 

      Aibar, Arturo (Universitat Politècnica de Catalunya, 2021-06)
      Bachelor thesis
      Open Access
      En los últimos el uso de enlaces ópticos han sido altamente incrementado debido a las ventajas que supone este sobre los enlaces eléctricos, junto con esto, también han aumentado los programas dedicados a la simulación de ...
    • Digital Nyquist WDM for access networks using limited bandwidth reflective semiconductor optical amplifiers 

      Lázaro Villa, José Antonio; Knorr, Sebastian; Bernhard, Schrenk; Cano Valadéz, Iván Nicolás; Polo Querol, Víctor; Prat Gomà, Josep Joan; Carena, Andrea; Bosco, Gabriella (Institute of Electrical and Electronics Engineers (IEEE), 2012)
      Conference report
      Restricted access - publisher's policy
      Digital Nyquist-WDM is experimentally demonstrated using RSOA-based colorless ONUs, providing a 6-fold enhancement of transmission capacity through 25km fiber, and showing digital Nyquist-WDM as promising candidate for ...
    • Effective amplification of real WDM burst traffic using optical gain clamping 

      Zannin, Marcelo; Taccheo, Stefano; Ennser, Karin; Careglio, Davide; Solé Pareta, Josep (2008-05-04)
      Conference report
      Open Access
      Experimental studies of real optical burst traffic in WDM systems are performed with optical gain clamping for stabilizing the EDFA amplification. Impairments of power variation due to burst are shown to be negligible.
    • Exploiting RSOA for uplink transmission with coherent detection for low cost UDWDM-PON 

      Chu, Guangyong; Lerín de la Santísima Trinidad, Adolfo; Cano Valadéz, Iván Nicolás; Polo Querol, Víctor; Tabares Giraldo, Jeison; Prat Gomà, Josep Joan (2014)
      Conference report
      Restricted access - publisher's policy
      Upstream phase modulation exploiting low cost reflective semiconductor optical amplifier (RSOA) at ONU is applied for simplified coherent detection through DFBs as local lasers at ONU and at OLT.
    • Generation of intrinsically CEP-stable few-cycle pulses in the mid-IR 

      Sánchez Peacham, Daniel Alexander (Universitat Politècnica de Catalunya, 2013-09-10)
      Master thesis
      Open Access
      [ANGLÈS] The generation of few cycle pulses in the mid-IR is investigated through a numerical non linear propagation code as a seed pulse for an OPCPA system
    • Multi-electron correlations in the emission of coherent extreme-ultraviolet light 

      De las Heras Muñoz, Alba; Hernández García, Carlos; Plaja Rustein, Luis (2021-05-13)
      Conference lecture
      Open Access
    • Optimizing reflective semiconductor optical amplifier as phase modulator for low cost colorless ONU with 3x3 homodyne detection 

      Chu, Guangyong; Polo Querol, Víctor; Lerín de la Santísima Trinidad, Adolfo; Cano Valadéz, Iván Nicolás; Prat Gomà, Josep Joan (2014)
      Conference report
      Restricted access - publisher's policy
      Overcome the limited modulation bandwidth of low cost uncooled To-can packaged RSOA (~400 MHz) and operate it at 3.125 Gb/s using homodyne techniques with the optimal performance for phase modulation via measured characteristics.
    • Stabilization of Broad Area Semiconductor Amplifiers and Lasers by Double Modulation of Pump and Refractive Index 

      Ahmed Waseem, Waqas Waseem; 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 ...
    • Stabilization of broad-area semiconductor laser sources by simultaneous index and pump modulations 

      Waseem Ahmed, Waqas; Kumar, Shubham; Medina Pardell, Judith; Botey Cumella, Muriel; Herrero Simon, Ramon; Staliunas, Kestutis (2018-06-01)
      Article
      Open Access
      We show that the emission of broad-area semiconductor amplifiers and lasers can be efficiently stabilized by introducing two-dimensional periodic modulations simultaneously on both the refractive index and the pump (gain–loss) ...
    • Statistical analysis of nonlinear optical amplifier in high saturation 

      Ruiz Moreno, Sergio; Junyent Giralt, Gabriel; Soneira Ferrando, M. José (1988-02)
      Article
      Open Access
    • UDWDM-PON using low-cost coherent transceivers with limited tunability and heuristic DWA 

      Sales Zaragozá, Vicente; Segarra Mullerat, Josep; Polo Querol, Víctor; Velásquez Micolta, Juan Camilo; Prat Gomà, Josep Joan (Institute of Electrical and Electronics Engineers (IEEE), 2016-08-01)
      Article
      Open Access
      A new Passive Optical Network (PON) for access, making use of Ultra Dense Wavelength Division Multiplexing (UDWDM) by densely spacing channels at few GHz, and introducing the “wavelength-to-the-user” concept, is proposed. ...
    • Weak value amplification : new insights and applications 

      Salazar Serrano, Luis José (Universitat Politècnica de Catalunya, 2016-10-13)
      Doctoral thesis
      Open Access
      Weak Value Amplification (WVA) is a signal enhancement technique proposed in 1988 by Aharonov, Albert, and Vaidman that has been widely used to measure tiny changes that otherwise cannot be determined because of technical ...