A Wavelength Tunable Q-Switched Erbium-Doped Fiber Laser with Fiber Bragg Grating Mirrors

Q-switched operation of an erbium-doped fiber laser with fiber grating mirrors is demonstrated for the first time. The resonator was formed by splicing two fiber gratings to erbium-doped fiber ends. One of the fiber gratings was periodically stretched by a piezoelectric transducer for the Q-switching operation. An output pulse with a pulse width of 2.46 µ s and a peak power of 2.1 mW was obtained for a 1.48 µ m pump power of 26 mW. The oscillation wavelength was 1.552 µ m and the repetition rate was 1 kHz. The laser oscillation wavelength was tuned from 1.552 µ m to 1.556 µ m by applying lateral stress to one of the fiber grating mirrors.