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.

© 2005 Optical Society of America

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Appl. Opt. (1)

Electron. Lett. (2)

J.L. Cruz, A. Díez, M.V. Andrés, A. Segura, B. Ortega y L. Dong, "Fibre Bragg gratings tuned and chirped using magnetic fields," Electron. Lett. 33, 235-236 (1997).
[CrossRef]

H. H. Kee, G. P. Lees and T. P. Newson, �??Narrow linewidth CW and Q-switched erbium-doped fibre loop laser,�?? Electron. Lett. 34, 1318-1319 (1998).
[CrossRef]

IEEE Photon. Technol. Lett. (2)

V. N. Philippov, A. V. Kiryanov and S. Unger, �??Advanced configuration of erbium fiber passively Q-switched laser with Co2+:ZnSe crystal as saturable absorber,�?? IEEE Photon. Technol. Lett. 16, 57-59 (2004).
[CrossRef]

D. W. Huang, W. F. Liu and C. C. Yang, �??Q-switched all-fiber laser with an acoustically modulated fiber attenuator,�?? IEEE Photon. Technol. Lett. 12, 1153-1155 (2000).
[CrossRef]

J. Lightwave Technol. (1)

V. Mizrahi, D. J. DiGiovanni, R. M. Atkins, S. G. Grubb, Y. K. Park and M. P. Delavaux, �??Stable single-mode erbium fiber-grating laser for digital communication,�?? J. Lightwave Technol. 11, 2021-2025 (1993).
[CrossRef]

Opt. Comm. (1)

N. A. Russo, R. Duchowicz, J. Mora, J. L. Cruz and M. V. Andrés, �??High-efficiency Q-switched erbium fiber laser using a Bragg grating-based modulator,�?? Opt. Comm. 210, 361-366 (2002).

Opt. Commun. (1)

L. Luo and P.L. Chu, �??Passive Q-switched erbium-doped fibre laser with saturable absorber,�?? Opt. Commun. 161, 257-263 (1999).
[CrossRef]

Opt. Eng. (1)

A. Chandonnet and G. Larose, �??High-power Q-switched erbium fiber laser using an all-fiber intensity modulator,�?? Opt. Eng. 32, 2031-2035 (1993).
[CrossRef]

Opt. Lett. (3)

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