title: Q-switched all-fiber laser based on magnetostriction modulation of a Bragg grating.
abstract: 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.
authors.forename: P
authors.initials: P
authors.lastname: Pérez-Millán
authors.forename: A
authors.initials: A
authors.lastname: Díez
authors.forename: M
authors.initials: M
authors.lastname: Andrés
authors.forename: D
authors.initials: D
authors.lastname: Zalvidea
authors.forename: R
authors.initials: R
authors.lastname: Duchowicz