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Q-switched all-fiber laser based on magnetostriction modulation of a Bragg grating

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Valencià Castellano

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Q-switched all-fiber laser based on magnetostriction modulation of a Bragg grating

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Pérez Millán, Pere; Díez Cremades, Antonio; Andrés, Miguel V.; Zalvidea, D.; Duchowicz, R.

Aquest document és un/a article, creat/da en: 2005

We report an actively Q-switched all-fiber laser based on magnetostriction modulation of a Bragg grating. The laser employs a pair of Bragg gratings as reflective mirrors, one of which is bonded to a magnetostrictive element. Lengthening of the magnetostrictive element when a magnetic field is applied shifts the Bragg wavelength of the grating, allowing control of the Q-factor of the cavity and, thus, performing active Q-switching. The magnetostrictive modulator is small, compact and requires less than 300 mW electrical drive power. Using erbium-doped fiber and a maximum pump power of 120 mW, Q-switch pulses of more than 1 W peak power were obtained, with a pulse repetition rate that can be continuously varied from 1 Hz to 125 kHz.

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