Articles by José Azaña in JoVE
Generation and Coherent Control of Pulsed Quantum Frequency Combs Benjamin MacLellan*1, Piotr Roztocki*1, Michael Kues1,2, Christian Reimer1, Luis Romero Cortés1, Yanbing Zhang1, Stefania Sciara1,3, Benjamin Wetzel1,4, Alfonso Cino3, Sai T. Chu5, Brent E. Little6, David J. Moss7, Lucia Caspani8, José Azaña1, Roberto Morandotti1,9,10 1Institut National de la Recherche Scientifique - Centre Énergie, Matériaux et Télécommunications (INRS-EMT), 2School of Engineering, University of Glasgow, 3Department of Energy, Information Engineering and Mathematical Models, University of Palermo, 4School of Mathematical and Physical Sciences, University of Sussex, 5Department of Physics and Material Science, City University of Hong Kong, 6State Key Laboratory of Transient Optics and Photonics, Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Science, 7Centre for Micro Photonics, Swinburne University of Technology, 8Institute of Photonics, Department of Physics, University of Strathclyde, 9Institute of Fundamental and Frontier Sciences, University of Electronic Science and Technology of China, 10National Research University of Information Technologies, Mechanics and Optics A protocol is presented for the practical generation and coherent manipulation of high-dimensional frequency-bin entangled photon states using integrated micro-cavities and standard telecommunications components, respectively.
Other articles by José Azaña on PubMed
Reconfigurable Generation of High-repetition-rate Optical Pulse Sequences Based on Time-domain Phase-only Filtering Optics Letters. | Pubmed ID: 16342729 We propose and demonstrate a fiber-based phase-only filtering technique for programmable optical pulse shaping, in which the filtering operation is implemented in the time domain by means of an electro-optical (EO) phase modulator. The technique has been applied for generating customized ultrahigh-repetition-rate optical pulse sequences (>40 GHz) from single input pulses by driving the EO phase modulator with a periodic electronic waveform (RF tone). The generated output pulses are replicas of the input pulse and both the repetition rate and the envelope profile of the generated sequences can be controlled and tuned electronically using this approach.
Proposal of a Uniform Fiber Bragg Grating As an Ultrafast All-optical Integrator Optics Letters. | Pubmed ID: 18157239 It is demonstrated that a uniform fiber Bragg grating (FBG) working in the linear regime inherently behaves as an optical temporal integrator over a limited time window. Specifically, the reflected temporal waveform from a weak-coupling uniform FBG is proportional to the time integral of an (arbitrary) optical pulse launched at the component input. This integration extends over a time window fixed by the duration of the squarelike temporal impulse response of the FBG. Ultrafast all-optical integrators capable of accurate operation over nanosecond time windows can be implemented using readily feasible FBGs. The introduced concepts are demonstrated by numerical simulations.
Simple and Highly Sensitive Optical Pulse-characterization Method Based on Electro-optic Spectral Signal Differentiation Optics Letters. | Pubmed ID: 18311284 A very simple self-referenced, linear pulse-characterization technique based on spectral phase reconstruction by frequency-domain signal differentiation is introduced. This technique can be implemented using electro-optic intensity modulation of the pulse under test with a synchronized RF sinusoid. The pulse spectral phase profile can be accurately and unambiguously reconstructed from only two measured energy spectra, i.e., at the input and at the output of the modulator, using a direct analytic equation. The method is experimentally demonstrated by precisely characterizing microwatt-power picosecond pulses after linear dispersion through short sections (50-700 m) of conventional single-mode fiber.