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Improved Modal Reconstruction for Spatially and Spectrally Resolved Imaging ({\rm S}^{2})

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6 Author(s)
Otto, H. ; Abbe Center of Photonics, Friedrich-Schiller-Univ. Jena, Jena, Germany ; Jansen, F. ; Stutzki, F. ; Jauregui, C.
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Spatially and spectrally resolved imaging (S2) is a very sensitive, robust and elegant method to measure the power of excited modes in a fiber. For the common reconstruction technique an approximation is necessary, which is based on dominant fundamental mode content. In this work we present several algorithms that significantly improve the accuracy of modal reconstruction for weak excited fundamental mode content. We show that in some cases general analytical solutions exist that can completely overcome the former limitation. In addition, we introduce an iterative procedure to improve the mode modal reconstruction independent of the specific used algorithm.

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Lightwave Technology, Journal of  (Volume:31 ,  Issue: 8 )