123 research outputs found

    Dispersion supported BB84 quantum key distribution using phase modulated light

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    We propose and experimentally demonstrate that, contrary to what was thought up to now, an efficient BB84 operation is feasible using the double phase modulator (PMPM) configuration in frequency-coded quantum key distribution systems without dispersion compensation. This is achieved by exploiting the chromatic dispersion provided by the fiber linking Alice and Bob. Thus, we refer to this system as dispersion supported or as the DS BB84 PMPM configuration. © 2011 IEEE.Mora Almerich, J.; Ruiz Alba Gaya, A.; Amaya Ocampo, WA.; Capmany Francoy, J. (2011). Dispersion supported BB84 quantum key distribution using phase modulated light. IEEE Photonics Journal. 3(3):433-440. doi:10.1109/JPHOT.2011.2146764S4334403

    Filosofia de la eloquencia

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    [4], XXIII, [1] h en bl., 232, [5] p., [1] h. en bl

    Observaciones críticas sobre la excelencia de la lengua castellana

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    Copia digital. Valladolid : Junta de Castilla y León. Consejería de Cultura y Turismo, 2012-201

    Microwave phase shifter based on fibre Bragg grating

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    A variable delay line is presented for phased array antennas based on a fibre Bragg grating which has a uniform period and operates at constant optical wavelength. The Bragg wavelength of a localised part of the fibre grating is modified by straining the fibre, the optical carrier is reflected by the strained part of the grating and the time delay of the microwave modulating signal is determined by the position where the strain has been applied. In this initial experiment time delay variations up to 330 ps in the frequency range 1 - 14 GHz have been achieved

    Centinela contra los franceses

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    Copia digital. Madrid : Ministerio de Cultura. Subdirección General de Coordinación Bibliotecaria, 2007En pie de imp. de la Segunda parte consta: Impreso en Madrid y por su original en México en la Oficina de Doña Maria Fernandez de Jauregui, calle Santo DomingoSegunda part. con port. y pag. propia

    Memorias históricas sobre la marina, comercio y artes de la antigua ciudad de Barcelona : tomo III

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    Es tomo III, en tres partesAntep. con tít.: Suplemento a las memorias históricas sobre la marina, comercio, y artes de la antigua ciudad de Barcelona. Tomo IIIPort. con viñeta calc.: "Montaña inv., Mòles sculp."Cabeceras calc. en cada una de las tres partes: "Montaña lo dibujó, Mòles lo grabó en Barcelona 1779" ; A. Carnicero la inv. y dibujó, P.P. Mòles la grabó en Barcelona. 1780"; "A. Carnicero la inventó, P.P. Mòles la grabó en Barcelona 1780
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