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9 March 2016 Average power limit of fiber-laser systems with nearly diffraction-limited beam quality
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Abstract
The maximum average power that can be emitted from an ytterbium-doped fiber-laser system is estimated. The analysis takes into account all the effects known so far that may limit the average power including transverse mode instabilities and photo darkening. Hereby, the recent experimental observation that transverse mode instabilities depend on the average heat load in a fiber amplifier is exploited. The results of this analysis show that there are three main limiting effects: stimulated Raman scattering, the brightness of the pump laser and transverse mode instabilities. Moreover, the analysis suggests that, disregarding possible practical constrains, the average output power of a fiber laser system can be, in principle, increased up to 70kW.
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Hans-Jürgen Otto, Cesar Jauregui, Jens Limpert, and Andreas Tünnermann "Average power limit of fiber-laser systems with nearly diffraction-limited beam quality", Proc. SPIE 9728, Fiber Lasers XIII: Technology, Systems, and Applications, 97280E (9 March 2016); https://doi.org/10.1117/12.2208670
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