Temporal Dynamics of Holmium-doped Fiber Laser with an Intracavity Mach–Zehnder Interferometer

An all-fiber scheme of Holmium laser with active Q-switching, implemented by an intracavity Mach-Zehnder interferometer, was realized. Influence of the cavity output mirror reflection coefficient (4 and 20%), modulation voltage and different pump power levels on the pulse duration was investigated. The minimum pulse duration of 0.62 μs was obtained in a scheme with an output Bragg grating reflection coefficient of 20%. Wherein the peak power was 13 W.