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Inversion grating assisted beam quality degradation in high power fiber laser systems

: Jauregui, C.; Eidam, T.; Limpert, J.; Tünnermann, A.

Optical Society of America -OSA-, Washington/D.C.:
Advanced Solid-State Photonics, ASSP 2011. CD-ROM : 13.-16.2.2011, Istanbul, Turkey
Washington, DC: OSA, 2011 (OSA Technical digest series)
Paper ATuD1
Conference "Advanced Solid-State Photonics" (ASSP) <2011, Istanbul>
Conference Paper
Fraunhofer IOF ()

Modal interference along a LMA fiber creates an inversion grating with the right period to provide energy transfer between the interfering modes. This effect can lead to a substantial degradation of the beam quality.