26 mJ, 130 W Q-switched fiber-laser system with near-diffraction-limited beam quality |
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Authors: | Stutzki Fabian Jansen Florian Liem Andreas Jauregui Cesar Limpert Jens Tünnermann Andreas |
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Institution: | Institute of Applied Physics, Abbe Center of Photonics, Friedrich-Schiller-Universit?t Jena, Jena, Germany. fabian.stutzki@uni‐jena.de |
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Abstract: | We demonstrate a Q-switched fiber laser system emitting sub-60 ns pulses with 26 mJ pulse energy and near-diffraction-limited beam quality (M2<1.3). In combination with a repetition rate of 5 kHz, a corresponding average output power of 130 W is achieved. This record performance is enabled by a large-pitch fiber with a core diameter of 135 μm. This fiber allows for effective single-mode operation with mode field diameters larger than 90 μm even at average output powers exceeding 100 W. |
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