Examinando Artículos y presentaciones en Congresos por Autor "Andrés, Miguel V."
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Acceso AbiertoHigh-repetition rate acoustic-induced Q-switched all-fiber laser(Centro de Investigaciones Ópticas (CIOp), 2005) Zalvidea, Dobryna J. V.; Russo, Nélida Araceli; Duchowicz, Ricardo; Delgado Pinar, Martina; Díez, Antonio; Cruz, José Luis; Andrés, Miguel V.We report a high repetition rate actively Q switched all fiber laser. The acousto optic interaction controls the cou pling between co propagating core and cladding modes and is used to modulate the optical losses of the cavity, which permits to perform active Q-switching. Using 1.4 m of 300 ppm Er-doped fiber and a maximum pump power of 120 mW, we have obtained up to 1 W peak power pulses, with a pulse repetition rate that can be continuously varied from 1 Hz to 120 kHz and a pulse width that changes from 70 ns to 2.2 μs.
Acceso AbiertoQ-switching of an erbium-doped fibre laser modulated by a Bragg grating fixed to a piezoelectric(Centro de Investigaciones Ópticas (CIOp), 2003) Duchowicz, Ricardo; Russo, Nélida Araceli; Sicre, Enrique Eduardo; Andrés, Miguel V.The performance of the Q-switched erbium-doped fibre laser with two fibre Bragg gratings as cavity mirrors was theoretically analysed, employing a set of rate equations for the ion populations and the photon flux inside the cavity. The simulation considers a system where the pulsed laser emission is produced by the temporal modulation of a Bragg grating fixed to a piezoelectric and operating in the 1550 nm spectral region. The temporal evolution of different frequency components of the laser emission produced is governed by the instantaneous overlap between the two gratings. Theoretical results are in agreement with previously reported experimental values.