Synchronized Tunable $Q$-Switched Fiber Lasers Using Deformable Achromatic Microelectromechanical Mirror

Abstract

We report the synchronization of actively -switched erbium- and ytterbium-doped fiber lasers by means of a single electrostatically actuated deformable metallic micromirror. Synchronized and tunable pulse trains were generated at 1.064 and 1.55 mum with a pulse duration and repetition rate of ~1.5 mus and 32 kHz, respectively. The output dual wavelength beam is then converted in a nonlinear crystal designed for sum frequency generation. Tunable output red radiation close to 630 nm is obtained.