Abstract

We report a master-oscillator fiber power-amplifier system consisting of a diode-pumped monolithic nonplanar ring laser as the master oscillator and a Yb-doped large-mode-area double-clad fiber as the power amplifier. The system emits up to 20.1  W of single-frequency radiation at a wavelength of 1064  nm with diffraction-limited beam quality M21.3. The optical emission spectrum and amplitude-noise behavior are investigated. Furthermore, the power-scaling possibilities are discussed.

© 2001 Optical Society of America

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