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Single-frequency master-oscillator fiber power amplifier system emitting 20 W of power

S. Höfer, A. Liem, J. Limpert, H. Zellmer, and A. Tünnermann
Institute of Applied Physics, Friedrich-Schiller-University Jena, Max-Wien-Platz 1, D-07743 Jena, Germany

S. Unger, S. Jetschke, and H.-R. Müller
Institute for Physical High Technology Jena, Winzerlaer Strasse 10, D-07745 Jena, Germany

I. Freitag
Innolight GmbH, Vahrenwalder Strasse 7, D-30165 Hannover, Germany

Optics Letters 26, 1326 (Sep. 2001).

We report a master-oscillator f iber 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 f iber 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 (M2 <=1.3). 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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Last change: 23. November 2001