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  • 2017 European Conference on Lasers and Electro-Optics and European Quantum Electronics Conference
  • (Optica Publishing Group, 2017),
  • paper CJ_6_4

Mitigation of Mode Instabilities in High-Power Fiber Laser Systems by Active Modulation of the Pump Power

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In recent years the evolution of the average output power emitted by high-power fiber-lasers and amplifiers has reached a level at which the onset of thermal effects has been observed. The most detrimental of these effects is the phenomenon of transverse mode instabilities (TMI) [1]. These instabilities are characterized by a sudden onset of spatial and temporal fluctuations in a formerly stable beam once a certain average output power threshold has been reached [2]. TMI are currently the most limiting effect for the further average output power scaling of fiber-laser systems and amplifiers with nearly diffraction-limited beam quality. Therefore, the development of mitigation strategies for TMI is critical to further enhance the performance of this technology.

© 2017 IEEE

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