Abstract
A hybrid master oscillator power amplifier is realised on a small area less than 100 mm2 combining an α-DFB-laser as master oscillator and a broad area laser as power amplifier. A quasi-cw output power of P=1.6 W at the wavelength λ=1057 nm is achieved with a beam quality factor M 2 less than 2 and a spectral width less than 6 pm.
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