All-fiber optically synchronized hybrid Er/Yb laser system for high power femtosecond pulse generation

The paper presents a novel design of an all-fiber hybrid erbium laser/ytterbium amplifier system for high power femtosecond pulse generation. Experimental setup consists of a passively mode locked femtosecond Er:fiber oscillator, a diode pumped Er-doped fiber amplifier, a single-mode fiber used as a nonlinear pulse compressor, a silica dispersion shifted fiber (DSF) for wavelength conversion, and a diode pumped two stage Yb-doped high power amplifier. Additionally, a free space grating pair compressor is used to shorten the output pulse to its transform limited duration.