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19 February 2009 Modal decomposition in step-index fibers by optical correlation analysis
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Abstract
The different propagating modes in an optical fiber determine the properties of the light emerging the fiber. Therefore an exact knowledge of the modal content is a key to understand the underlying physical effects. Different approaches exist to measure the modal content of an optical fiber, such as interferometry, M2 measurement or phase retrieval methods with either high experimental complexity or ambiguity relating to the modal content. In this paper we present a method for measuring the modal content by the aid of optical correlation analysis. We demonstrate this with measurements on a passive step-index LMA fiber at a wavelength of 1064 nm.
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Thomas Kaiser, Siegmund Schröter, and Michael Duparré "Modal decomposition in step-index fibers by optical correlation analysis", Proc. SPIE 7194, Laser Resonators and Beam Control XI, 719407 (19 February 2009); https://doi.org/10.1117/12.809993
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