7 March 2014 Mode coupling in few-mode large-mode-area fibers
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We present an experimental study on mode coupling characteristics of few-mode large-mode-area (LMA) fibers, which are widely used in high power fiber lasers. The modal power allocation is measured by modal decomposition of the nearfield intensity profile of the output beam. Cut-back measurements are carried out with commonly-used fibers with different fiber geometries. The evolution of the modal power content due to mode coupling is presented. The influence of the fiber geometry on mode coupling is discussed.
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Changgeng Ye, Changgeng Ye, Joona Koponen, Joona Koponen, Ville Aallos, Ville Aallos, Laeticia Petit, Laeticia Petit, Ossi Kimmelma, Ossi Kimmelma, Teemu Kokki, Teemu Kokki, "Mode coupling in few-mode large-mode-area fibers", Proc. SPIE 8961, Fiber Lasers XI: Technology, Systems, and Applications, 89612W (7 March 2014); doi: 10.1117/12.2038575; https://doi.org/10.1117/12.2038575

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