Abstract
Spatially and spectrally resolved imaging
$(S^{2}$
imaging) and correlation filter technique (CFT) are two very different,
widespread fiber mode analysis techniques. Both techniques have been successfully employed to
decompose few-modes and multimode beams respectively. In this study, we present a novel
experimental tool combining
$S^{2}$
imaging and CFT mode analyses in a unique system. We demonstrate that both
methods are complementary with the ability to fully resolve scalar and vector-valued transverse
modal fields. Using results from the combined experiment, mode powers (
${\rho}^{2})$
evaluated from CFT analysis and
$S^{2}$
imaging are directly compared for a wide range of fiber beams (from single- to
multi-mode). As a result, we experimentally identify the mode detection limit of each mode
analysis and prove that
$S^{2}$
imaging accuracy range can be considerably increased employing an analytical
mode evaluation method. The conclusion contains a table summarizing the expertise of each mode
analysis.
© 2013 IEEE
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