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20 June 2024 Limitations and perspectives in power scaling of fiber lasers
Till Walbaum, Maximilian Strecker, Marco Plötner, Friedrich Möller, Gonzalo Palma-Vega, Steffen Trautmann, Carolin Rothhardt, Stefan Kuhn, Nicoletta Haarlammert, Thomas Schreiber
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Proceedings Volume PC13003, Fiber Lasers and Glass Photonics: Materials through Applications IV; PC130030A (2024) https://doi.org/10.1117/12.3024100
Event: SPIE Photonics Europe, 2024, Strasbourg, France
Abstract
Fiber lasers are reliable and flexible sources of high laser power with excellent beam quality. However, limitations due to nonlinear and thermal effects, hamper further power scaling. We will give an overview over relevant influencing factors for these limitations, on the component side as well as regarding system design. Experimental examples in the 1µm and 2µm spectral region will be shown for the proposed techniques to tackle several of these obstructions, with a focus on ways to suppress transverse mode instabilities. Remaining limitations for single fiber systems can be overcome by parallelization of amplification, using multiple actively doped cores running below the critically power threshold each. Such fiber cores can be housed separately or in a single multi-core fiber. We will address coherent and spectral methods to (re-)combine multiple fiber laser output beams while maintaining beam quality and discuss scaling aspects and potential limitations to these architectures.
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Till Walbaum, Maximilian Strecker, Marco Plötner, Friedrich Möller, Gonzalo Palma-Vega, Steffen Trautmann, Carolin Rothhardt, Stefan Kuhn, Nicoletta Haarlammert, and Thomas Schreiber "Limitations and perspectives in power scaling of fiber lasers", Proc. SPIE PC13003, Fiber Lasers and Glass Photonics: Materials through Applications IV, PC130030A (20 June 2024); https://doi.org/10.1117/12.3024100
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KEYWORDS
Fiber lasers
Multicore fiber
Design
Transverse mode instability
Beam combiners
Dopants
Fiber amplifiers
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